Remove "_seconds" from metric names

Author: ptodev

connector/servicegraphconnector/README.md

@@ -65,14 +65,14 @@ TLDR: The connector will try to find spans belonging to requests as seen from th
 
 The following metrics are emitted by the connector:
 
-| Metric                                      | Type      | Labels                          | Description                                                  |
-|---------------------------------------------|-----------|---------------------------------|--------------------------------------------------------------|
-| traces_service_graph_request_total          | Counter   | client, server, connection_type | Total count of requests between two nodes                    |
-| traces_service_graph_request_failed_total   | Counter   | client, server, connection_type | Total count of failed requests between two nodes             |
-| traces_service_graph_request_server_seconds | Histogram | client, server, connection_type | Time for a request between two nodes as seen from the server |
-| traces_service_graph_request_client_seconds | Histogram | client, server, connection_type | Time for a request between two nodes as seen from the client |
-| traces_service_graph_unpaired_spans_total   | Counter   | client, server, connection_type | Total count of unpaired spans                                |
-| traces_service_graph_dropped_spans_total    | Counter   | client, server, connection_type | Total count of dropped spans                                 |
+| Metric                                      | Type      | Labels                          | Description                                                               |
+|---------------------------------------------|-----------|---------------------------------|---------------------------------------------------------------------------|
+| traces_service_graph_request_total          | Counter   | client, server, connection_type | Total count of requests between two nodes                                 |
+| traces_service_graph_request_failed_total   | Counter   | client, server, connection_type | Total count of failed requests between two nodes                          |
+| traces_service_graph_request_server         | Histogram | client, server, connection_type | Number of seconds for a request between two nodes as seen from the server |
+| traces_service_graph_request_client         | Histogram | client, server, connection_type | Number of seconds for a request between two nodes as seen from the client |
+| traces_service_graph_unpaired_spans_total   | Counter   | client, server, connection_type | Total count of unpaired spans                                             |
+| traces_service_graph_dropped_spans_total    | Counter   | client, server, connection_type | Total count of dropped spans                                              |
 
 Duration is measured both from the client and the server sides.