Merge branch 'stable-5.13' into stable-6.0

* stable-5.13:
  [bazel] Skip ConfigTest#testCommitTemplatePathInHomeDirecory
  Demote severity of some error prone bug patterns to warnings

Change-Id: I63b9adc22e1e1d9a9c754fe070ddfe21a52446c7
diff --git a/tools/BUILD b/tools/BUILD
index 0c6b8ec..1826249 100644
--- a/tools/BUILD
+++ b/tools/BUILD
@@ -51,7 +51,7 @@
         "-Xep:CannotMockFinalClass:ERROR",
         "-Xep:ClassCanBeStatic:ERROR",
         "-Xep:ClassNewInstance:ERROR",
-        "-Xep:DefaultCharset:ERROR",
+        "-Xep:DefaultCharset:WARN",
         "-Xep:DoubleCheckedLocking:ERROR",
         "-Xep:ElementsCountedInLoop:ERROR",
         "-Xep:EqualsHashCode:ERROR",
@@ -61,7 +61,7 @@
         "-Xep:FragmentInjection:ERROR",
         "-Xep:FragmentNotInstantiable:ERROR",
         "-Xep:FunctionalInterfaceClash:ERROR",
-        "-Xep:FutureReturnValueIgnored:ERROR",
+        "-Xep:FutureReturnValueIgnored:WARN",
         "-Xep:GetClassOnEnum:ERROR",
         "-Xep:ImmutableAnnotationChecker:ERROR",
         "-Xep:ImmutableEnumChecker:ERROR",
@@ -95,7 +95,7 @@
         "-Xep:TypeParameterShadowing:ERROR",
         "-Xep:TypeParameterUnusedInFormals:WARN",
         "-Xep:URLEqualsHashCode:ERROR",
-        "-Xep:UnusedException:ERROR",
+        "-Xep:UnusedException:WARN",
         "-Xep:UnsynchronizedOverridesSynchronized:ERROR",
         "-Xep:WaitNotInLoop:ERROR",
     ],