Use same memory settings for surefire and failsafe plugins

  - This addresses the OOME issue seen during the tail end
    of the build when running unit tests.

Change-Id: I054e1dfa502bca19a62521a3b714f1a072b59ded
Signed-off-by: Prasanth Pallamreddy <ppallamr@cisco.com>
Merge "Use same memory settings for surefire and failsafe plugins"