Fix minor spelling mistakes in tests/cmocka/* Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

TESTS: Use the DP handlers in simple provider tests, add more tests Use the full simple access control handlers, just like SSSD does in the tests. Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

TESTS: Convert the simple access provider to cmocka Using a cmocka-based test allows us to initialize the domain using the common helper functions which in turn allows us to set different properties with confdb, same as sssd itself does. Reviewed-by: Sumit Bose <sbose@redhat.com>