Bug 2157 - Race condition when adding a RPC implementation with an
output

* added wait for schema in 'getRpcQnamesFor()' method

Change-Id: I2baa71f4237a1125db9a6e5ec8077237dc8ef544
Signed-off-by: Jan Hajnar <jhajnar@cisco.com>
Merge "Bug 2157 - Race condition when adding a RPC implementation with an output"