chore(jenkins): Update Jenkins plugins (#1514)

Author: gounthar

dockerfiles/plugins.txt

@@ -23,7 +23,7 @@ git:5.7.0
 github-api:1.321-488.v9b_c0da_9533f8
 github-branch-source:1834.v857721ea_74c6
 github:1.44.0
-gradle:2.15
+gradle:2.16.1149.v711b_998b_0532
 instance-identity:203.v15e81a_1b_7a_38
 ionicons-api:94.vcc3065403257
 jackson2-api:2.19.2-408.v18248a_324cfe