[CORD-2516] Implement HSS-DB service and its synchronizer

Change-Id: I3b5185669bf8a4506d4d60b8bc858537f41c640a
diff --git a/xos/synchronizer/hssdb_config.yaml b/xos/synchronizer/hssdb_config.yaml
new file mode 100644
index 0000000..a672282
--- /dev/null
+++ b/xos/synchronizer/hssdb_config.yaml
@@ -0,0 +1,22 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: hssdb-synchronizer
+accessor:
+  username: xosadmin@opencord.org
+  password: "@/opt/xos/services/hssdb/credentials/xosadmin@opencord.org"
+dependency_graph: "/opt/xos/synchronizers/hssdb/model-deps"
+steps_dir: "/opt/xos/synchronizers/hssdb/steps"
+sys_dir: "/opt/xos/synchronizers/hssdb/sys"
+model_policies_dir: "/opt/xos/synchronizers/hssdb/model_policies"