add http api to retreive only plugin names

cbpi/controller/plugin_controller.py

@@ -230,6 +230,7 @@ class PluginController():
             for key, module in discovered_plugins.items():
                 try:
                     meta = metadata(key)
+                    if meta["Name"] != "cbpi4gui":
                         result.append(dict(Name=meta["Name"]))
                             
                 except Exception as e:

cbpi/http_endpoints/http_plugin.py

@@ -86,3 +86,21 @@ class PluginHttpEndpoints:
             """
         plugin_list = await self.cbpi.plugin.load_plugin_list()
         return web.json_response(plugin_list, dumps=json_dumps)
+    
+    @request_mapping(path="/names", method="GET", auth_required=False)
+    async def list(self, request):
+        """
+            ---
+            description: Get a list of avialable plugin names
+            tags:
+            - Plugin
+            produces:
+            - application/json
+            responses:
+                "200":
+                    description: successful operation. Return "pong" text
+                "405":
+                    description: invalid HTTP Method
+            """
+        plugin_names = await self.cbpi.plugin.load_plugin_names()
+        return web.json_response(plugin_names, dumps=json_dumps)