Merge branch 'stable-4.2'

Merge branch 'stable-4.2'

* stable-4.2:
  CheckoutCommandTest: Create Git instances in try-with-resource
  BranchCommandTest: Create Git instances in try-with-resource
  CheckoutTest: Create Git instances in try-with-resource
  BranchTest: Create Git instances in try-with-resource
  URIishTest: Use @Test annotation's `expected` argument
  Suppress "The allocated object is never used" warning in tests
  Add $NON-NLS to suppress "Non-externalized string literal" warnings
  Don't use deprecated constructors of CmdLineException
  Prepare 4.2.0-SNAPSHOT builds
  Remove org.eclipse.jgit.updatesite project from tools/version.sh
  RevParse: Remove superfluous semicolon
  RefUpdateTest: Use try-with-resource for auto-closable types
  RefUpdateTest: Add null check to prevent potential NPE
  CommitCommand: Remove redundant null check
  JGit v4.2.0.201512141825-rc1

Change-Id: I2179859289b2f2e3d0b7c6d02ef7e7890c467f7b
Signed-off-by: David Pursehouse <david.pursehouse@sonymobile.com>