Update Grafana files

Author: ebattat

benchmark_runner/grafana/perf/dashboard.json

@@ -1100,6 +1100,10 @@
                            "index": 310,
                            "text": "4.15.6-3"
                         },
+                        "41572": {
+                           "index": 327,
+                           "text": "4.15.7-2"
+                        },
                         "4159": {
                            "index": 249,
                            "text": "4.15.9"
@@ -1236,6 +1240,10 @@
                            "index": 318,
                            "text": "4.16.15"
                         },
+                        "41616": {
+                           "index": 325,
+                           "text": "4.16.16"
+                        },
                         "416170": {
                            "index": 291,
                            "text": "4.16.1-70"
@@ -1320,6 +1328,10 @@
                            "index": 324,
                            "text": "4.16.4-47"
                         },
+                        "416449": {
+                           "index": 326,
+                           "text": "4.16.4-49"
+                        },
                         "41645": {
                            "index": 322,
                            "text": "4.16.4-5"