HYD-2353 EMAIL_SUBJECT_PREFIX property set in local_settings.py is ignored
HYD-2353 EMAIL_SUBJECT_PREFIX property set in local_settings.py is ignored

EMAIL_SUBJECT_PREFIX was not being used for mail sent by the manager. The value is
used by the standard python libraries but IML was overriding it with the fixed
value of 'New Chroma Server alert'.  This simple patch fixes up the issue.

Change-Id: Iefd4cd2c7333ec6cbe678055f77ccd17620f110d
Signed-off-by: Chris Gearing <149a3c4298d99c315fc555357d57d2940923ba5f@intel.com>
Reviewed-on: http://review.whamcloud.com/13977
Tested-by: Jenkins
Tested-by: Chroma Test User <a0b98b2ff5154776fa24760ef410655af7a8b56c@intel.com>
Reviewed-by: Joe Grund <5a0004131f5af71cc30270f318d2c30ba7aaa99a@intel.com>
Reviewed-by: Gene Campbell <2371123b661d3b976710d67b1449d46c3a48dbe8@intel.com>

intel-hpdd/intel-manager-for-lustre,intel-hpdd/intel-manager-for-lustre,intel-hpdd/intel-manager-for-lustre