Add tests to MANIFEST.in and run them during an rpm build

Change-Id: I298e3719ee461e747fb47fa681b326578bf26d85
Signed-off-by: Martin Sivak <msivak@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/16883
Reviewed-by: Adam Litke <agl@us.ibm.com>
Tested-by: Adam Litke <agl@us.ibm.com>