ALLJOYN-1751 Resolve Klocwork issue 1356.

Change-Id: I8a715876f057788ebfd34fe5861d8749394fd028
Minor API Documentation cleanup.

Fixed documentation that was marked @internal with @cond flags so
doxygen would ignore code that should not show up in the public API.

Change-Id: I36dd301b1910c0f6f259e96d7ac97022bc36a225
ALLJOYN-1741 Hold nametable lock while invalidating virtual endpoint.

Change-Id: I2586494a5582334974d1143f006f8e2f6199ee98