message: Make regex test less brittle by not hardcoding the size.
  RE2 may change the underlying implementation, resulting in a different
  program size.
diff: @@ -50,9 +50,8 @@ TEST(Utility, ParseRegex) {
  envoy::type::matcher::RegexMatcher matcher;
  matcher.mutable_google_re2()->mutable_max_program_size()->set_value(1);
  matcher.set_regex("/asdf/.*");
  - EXPECT_THROW_WITH_MESSAGE(Utility::parseRegex(matcher), EnvoyException,
  - "regex '/asdf/.*' RE2 program size of 24 > max program size of 1. "
  - "Increase configured max program size if necessary.");
  + EXPECT_THROW_WITH_REGEX(Utility::parseRegex(matcher), EnvoyException,
  + "RE2 program size of [0-9]+ > max program size of 1\\.");
  }
  }
  