Merge branch 'stable-3.3'

* stable-3.3:
  Prepare 3.3.2-SNAPSHOT builds
  JGit v3.3.1.201403241930-r
  Retry to call credentials provider if http authentication failed
  Ensure that ssh authentication is retried only in JGit
  [findBugs] Ensure streams are closed in a finally block
  Update com.jcraft.jsch to 0.1.50 also in pom dependencies

Change-Id: I45b48a3f2dc8c7708e9518645d72bc5645002836
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>