Bug 1378552: install_local_hadoop fails in a binary package

The binary package already contains the TRX jar - but it
still tries to build it.

Update install_local_hadoop to only build TRX if the
TRX jar does not exist.

Change-Id: Icad000cfea026d18932e598896b44d24563b2613
Merge "Bug 1378552: install_local_hadoop fails in a binary package"