Prefer re2 over java.util.regex

Java's stock regex implementation doesn't guarantee linear time
complexity which makes it a security liability.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=121159875

java/google/registry/repositories.bzl

@@ -508,6 +508,12 @@ def domain_registry_repositories():
       sha1 = "f7122f6ab1f64bdf9f5970b0e89bfb355e036897",
   )
 
+  native.maven_jar(
+      name = "re2j",
+      artifact = "com.google.re2j:re2j:1.1",
+      sha1 = "d716952ab58aa4369ea15126505a36544d50a333",
+  )
+
   native.maven_jar(
       name = "servlet_api",
       artifact = "org.apache.tomcat:servlet-api:6.0.20",