tests: use dict() instead Mock() to test config
tests: use dict() instead Mock() to test config

Addresses failure in verify_package_version:
    TypeError: argument of type 'Mock' is not iterable

Signed-off-by: Kyr Shatskyy <82d0c7561ff7e9a20a19db22e8fb5b2adaa3d71e@gmail.com>

ktdreyer/teuthology,SUSE/teuthology,SUSE/teuthology,dmick/teuthology,dmick/teuthology,ceph/teuthology,ktdreyer/teuthology,SUSE/teuthology,dmick/teuthology,ceph/teuthology