Bug where 'True'/'False' strings were being passed in REST to Tacker
service which would end up throwing an exception because the DB type for
symmetrical is boolean/small int. This converts it to boolean in the
client.
Closes-Bug: 1711550
Change-Id: Ide2aeab73b1dd88beb6e491e6b07cdee9fb7e48a
Signed-off-by: Tim Rozet <trozet@redhat.com>