jsonrpc: vsam-api removal

vdsm-api was removed and all rpc related code was moved to rpc package
within vdsm. The code is packaged as part of vdsm-jsonrpc rpm.

Removed package was design to hold jsonrpc schema and its parsing code.
Jsonrpc related code was packaged already in jsonrpc. Together with
jsonrpc being required we do not need vdsm-api anymore.

Change-Id: Ib8a6bc4a064952e1c3a14b27b8db6011767a9d80
Signed-off-by: pkliczewski <piotr.kliczewski@gmail.com>
Reviewed-on: http://gerrit.ovirt.org/28527
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Reviewed-by: Nir Soffer <nsoffer@redhat.com>