Integration Tests

[tobiasKaminsky]

This adds tests to #135 & introduces integration and unit tests in general.

• needs instrumented tests (tests running in emulator)
• moved src, res to new folder structure (otherwise IT would not work) [for project test_client]
• increased lint due to warning of outdated gradle deps

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@7332097). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             master   #137   +/-   ##
=======================================
  Coverage          ?     0%           
=======================================
  Files             ?      2           
  Lines             ?    104           
  Branches          ?      7           
=======================================
  Hits              ?      0           
  Misses            ?    104           
  Partials          ?      0

Impacted Files	Coverage Δ
.../owncloud/android/lib/testclient/TestActivity.java	0% <ø> (ø)
...estclient/SelfSignedConfidentSslSocketFactory.java	0% <ø> (ø)

[AndyScherzinger]

👍 fine by me

[tobiasKaminsky]

Is there something missing here?
Although we do not (yet) have many integration tests, I would like to have this in, so that we can at least try to write some new 👍