Adding messaging4transport features.

Adding messaging4transport features.

1) Feature Tests Pass: https://jenkins.opendaylight.org/releng/view/messaging4transport/job/messaging4transport-merge-beryllium/18/

2) Features Comply with Guidelines:
https://git.opendaylight.org/gerrit/gitweb?p=messaging4transport.git;a=blob;f=features/src/main/features/features.xml

a) Feature Names: odl-messaging4transport-api  odl-messaging4transport

b) Features Descriptions: Present

c) Features Start-Levels: No start-levels on <bundle> elements or <feature> elements

3) Features Tested:
Features have been tested for functionality with
a) feature:install odl-messaging4transport-api  odl-messaging4transport
b) feature:install odl-integration-compatible-with-all

4) Integration Test Impact: None

Change-Id: I930b9ef7b12480871a28a1b1ccb38e18563af3ac
Signed-off-by: Pradeeban Kathiravelu <kk.pradeeban@gmail.com>