Moved built-in policies from external files to internal database. (#75)

test/docker/expected_results/openssh_5.6p1_custom_policy_test3.json

@@ -0,0 +1 @@
+{"errors": [{"actual": ["ssh-rsa", "ssh-dss"], "expected_optional": [""], "expected_required": ["ssh-rsa", "ssh-dss", "key_alg1"], "mismatched_field": "Host keys"}], "host": "localhost", "passed": false, "policy": "Docker policy: test3 (version 1)"}