Merge branch 'stable-2.16'

* stable-2.16:
  Mark greenmail as testonly
  Bazel: Fix testonly values in BUILD and .bzl files
  ListBranchesIT: Also assert on the expected ref of refs/meta/config
  Consistently define default serialVersionUID
  Scripts: Use bash in shebang
  GroupsUpdate: Evict group caches on group creation

Change-Id: Ide87f2555d458c93c351d48693af520a3a80b656
diff --git a/lib/greenmail/BUILD b/lib/greenmail/BUILD
index 5d8e1d6..9cbd0eb 100644
--- a/lib/greenmail/BUILD
+++ b/lib/greenmail/BUILD
@@ -4,14 +4,14 @@
 
 java_library(
     name = "javax-activation",
-    testonly = 1,
+    testonly = True,
     data = ["//lib:LICENSE-DO_NOT_DISTRIBUTE"],
     exports = ["@javax-activation//jar"],
 )
 
 java_library(
     name = "greenmail",
-    testonly = 1,
+    testonly = True,
     data = ["//lib:LICENSE-Apache2.0"],
     exports = ["@greenmail//jar"],
     runtime_deps = select({