Introduced Activator in the Library module to make it OSGi friendly.

PAX-exam is not included due to the current merge resolution happening in parallel.

Change-Id: Ic25ae261905d2ea081d2bd936300cb92e7df4542
Signed-off-by: Madhu Venugopal <mavenugo@gmail.com>
Merge "Introduced Activator in the Library module to make it OSGi friendly." into topic/schema