Fixed crash when rejecting broken package

Fixed crash when rejecting broken package

To obtain revision create_sr code queries source package and crashes
when source is broken with ObsError: <obs>cat't query source <package>
from project <prerelease project>: HTTP Error 400: service gbs failed

This makes it impossible to reject broken submissions.

This change catches exeption and tries to avoid querying the source by
providing revision 1 to create_sr API. As for rejecting it doesn't
matter much which revision to reject it should be safe.

Fixes: #1687
Change-Id: I21b9dda32686c94bfb8e81201424b3e7e7f128b5
Signed-off-by: Ed Bartosh <eduard.bartosh@intel.com>
Reviewed-on: https://otctools.jf.intel.com/review/10674
Tested-by: OTC Tools Tester <ed.bartosh@linux.intel.com>