fix #11518: update Insight UI context menu tests

[mtbc]

Insight's UI changed and the context menu tests had to change accordingly. This required extension of functionality so that the relevant keywords could work down into submenus.

This PR should fix https://trac.openmicroscopy.org.uk/ome/ticket/11518 to make ./build.py -f components/tests/ui/build.xml ui-test-insight -DTEST=menus pass.

In general, the tests seem to pass far more reliably locally than on Hudson.

[jburel]

./build.py -f components/tests/ui/build.xml ui-test-insight -DTEST=menus
Buildfile: /Users/jburel/Documents/git-repo/openmicroscopy/components/tests/ui/build.xml
Entering /Users/jburel/Documents/git-repo/openmicroscopy/components/tests/ui...

ui-test-insight:
Entering /Users/jburel/Documents/git-repo/openmicroscopy/components/tests/ui...

run_folder_insight:
==============================================================================
Menus                                                                         
==============================================================================
Menus.Context-Menus                                                           
==============================================================================
Enabled Menu Items :: check that context menu items are correctly ... | PASS |
------------------------------------------------------------------------------
Menus.Context-Menus                                                   | PASS |
1 critical test, 1 passed, 0 failed
1 test total, 1 passed, 0 failed
==============================================================================
Menus                                                                 | PASS |
1 critical test, 1 passed, 0 failed
1 test total, 1 passed, 0 failed
==============================================================================

[jburel]

@mtbc, @sbesson:

http://hudson.openmicroscopy.org.uk/view/All/job/OMERO-merge-robotframework-stable/92/

*sys-package-mgr*: processing new jar, '/opt/hudson/workspace/OMERO-merge-robotframework-stable/lib/repository/swinglibrary-1.6.0a.jar'
*sys-package-mgr*: can't write cache file for '/opt/hudson/workspace/OMERO-merge-robotframework-stable/lib/repository/swinglibrary-1.6.0a.jar'
*sys-package-mgr*: processing modified jar, '/System/Library/Java/Extensions/QTJava.zip'
*sys-package-mgr*: can't write cache file for '/System/Library/Java/Extensions/QTJava.zip'
*sys-package-mgr*: can't write index file
==============================================================================
Menus                                                                         
==============================================================================
Menus.Context-Menus                                                           
==============================================================================
Enabled Menu Items :: check that context menu items are correctly ... | PASS |
------------------------------------------------------------------------------
Menus.Context-Menus                                                   | PASS |
1 critical test, 1 passed, 0 failed
1 test total, 1 passed, 0 failed
==============================================================================
Menus                                                                 | PASS |
1 critical test, 1 passed, 0 failed
1 test total, 1 passed, 0 failed
==============================================================================

The failure of the job is not related to the PR. It is due to a missing jar see gh-1628

[jburel]

@mtbc, @sbesson: all the tests pass, so okay for this PR.
see http://hudson.openmicroscopy.org.uk/view/All/job/OMERO-merge-robotframework-stable/95/console

[sbesson]

From [http://hudson.openmicroscopy.org.uk/view/Failing/job/OMERO-merge-robotframework-stable/95],

==============================================================================
Menus                                                                         
==============================================================================
Menus.Context-Menus                                                           
==============================================================================
Enabled Menu Items :: check that context menu items are correctly ... | PASS |
------------------------------------------------------------------------------
Menus.Context-Menus                                                   | PASS |
1 critical test, 1 passed, 0 failed
1 test total, 1 passed, 0 failed
==============================================================================
Menus                                                                 | PASS |
1 critical test, 1 passed, 0 failed
1 test total, 1 passed, 0 failed
==============================================================================

and under components/tests/ui/target/reports/insight/menus/output.xml

<suite source="/opt/hudson/workspace/OMERO-merge-robotframework-stable/components/tests/ui/testcases/insight/menus/context-menus.txt" id="s1-s1" name="Context-Menus">
<test id="s1-s1-t1" name="Enabled Menu Items">
...
<status status="PASS" critical="yes" endtime="20131017 07:23:26.943" starttime="20131017 07:23:21.825"></status>
</test>

Apart from the unrelated SAX exception, this is ready to merge.

[mtbc]

--rebased-to #1636