add get_service_with_docs_by_service_type()

Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: tischrei <tino.schreiber@t-systems.com>
Co-committed-by: tischrei <tino.schreiber@t-systems.com>

otc_metadata/services.py

@@ -209,3 +209,22 @@ class Services(object):
                 doc_struct[srv["service_category"]].append(srv_res)
 
         return dict(categories=doc_struct)
+
+    def get_service_with_docs_by_service_type(self, service_type):
+        """Retrieve service and service docs by service_type
+
+        :param str service_type: Filter by service_type
+        """
+        res = dict()
+        res['service'] = {}
+        docs = []
+        services = self._service_data
+        for doc in services['documents']:
+            if doc['service_type'] == service_type:
+                docs.append(doc)
+        res['documents'] = docs
+        for service in services['services']:
+            if service['service_type'] == service_type:
+                res['service'] = service
+                break
+        return res