Workaround for javadoc issue

Per recommendation from LF IT, set MAVEN_DIR to empty string to resolve
issue with javadoc jobs.

Change-Id: I7db2c0935606c5e7d7e69f04d90dae76d2183c82
Issue-ID: CCSDK-2733
Signed-off-by: Dan Timoney <dtimoney@att.com>
4 files changed