Update .travis.yml

[davorbonaci]

Revert "mvn verify" back to "mvn install" since it breaks the followup script.

[davorbonaci]

Unfortunately, this is not as easy. See Travis results here. Error:

The log length has exceeded the limit of 4 Megabytes (this usually means that test suite is raising the same exception over and over).

The build has been terminated.

[mxm]

The Flink Runner needs the verify phase to run the integration tests. The output on Travis needs to be reduced just to ERROR logging. Otherwise it will exceed the maximum log file length. For the Flink runner I've added a log4j-test.property which is loaded when the tests are executed.

[davorbonaci]

R: @dhalperi

I've suppressed all [INFO] logs for the time being. The right fix is likely to decrease the log level of some of Flink logs from [INFO] to [DEBUG], but let's try to avoid that for now.

Let's see will this pass.

[dhalperi]

The grep command did not work -- Flink's INFO logs do not match the template you grep -v'ed. Plus some of these logs are many-lines-long where only the first line has INFO.

https://travis-ci.org/davorbonaci/beam/jobs/114395010

Test testJobWithObjectReuse(org.apache.beam.runners.flink.TfIdfITCase) successfully run.
================================================================================
16/03/07 23:48:58 INFO flink.TfIdfITCase: 
================================================================================
Test testJobCollectionExecution(org.apache.beam.runners.flink.TfIdfITCase) is running.
--------------------------------------------------------------------------------
16/03/07 23:48:58 INFO flink.FlinkPipelineExecutionEnvironment: Creating the required Batch Execution Environment.
16/03/07 23:48:58 INFO flink.FlinkPipelineRunner: Executing pipeline using FlinkPipelineRunner.
16/03/07 23:48:58 INFO flink.FlinkPipelineRunner: Translating pipeline to Flink program.
enterCompositeTransform- 32296114null
|   visitTransform- 3aa481c6Create.Values
|   enterCompositeTransform- 6440c3eTFIDF.ComputeTfIdf
|   |   enterCompositeTransform- 5d7fbda8Keys
|   |   |   visitTransform- 6d7c908cKeys [AnonymousParDo]
|   |   leaveCompositeTransform- 5d7fbda8Keys
<snip>

[davorbonaci]

@dhalperi, ready for another look.

It fixes the interaction with the following script, but doesn't address the logging output in the 'verify' phase. Will file a JIRA issue for that.

[davorbonaci]

JIRA for followup: https://issues.apache.org/jira/browse/BEAM-98

[dhalperi]

LGTM

[mxm]

We need mvn verify to properly execute all the tests. Changing back to "install" in my opinion is not an option. We should instead adjust the script which fails.

So another followup :) https://issues.apache.org/jira/browse/BEAM-99

edit: This is actually not true. install will also walk through the verify phase.