When magnum is using x509keypair as backend
the db query fails to apply the tenant filters
due to the missing context.
Pass the context to the the cert_manager.
story: 2006897
task: 37533
Change-Id: Ifdedac420fe4384013704865fa05ea6f1c15feb5
Signed-off-by: Spyros Trigazis <spyridon.trigazis@cern.ch>