Upgrade error-prone to 3.3.4 (#848)

* Upgrade error-prone to 3.3.4

This would fix the failure with openjdk 11.0.9 in
3.3.3.

Fixed new antipatterns raised by the new version:
- Replaced unnecessary lambdas with methods.
- Switched wait/sleep calls to equivalent methods using java.time types
- Types inheriting Object.toString() should not be assigned to string
parameter in logging statements.

java_common.gradle

@@ -67,7 +67,7 @@ configurations {
 
 dependencies {
     // compatibility with Java 8
-    errorprone("com.google.errorprone:error_prone_core:2.3.3")
+    errorprone("com.google.errorprone:error_prone_core:2.3.4")
 }
 
 test {