Update commons-validator to 1.4.1

This fixes a bug where a valid email address is incorrectly rejected.

Bug: Issue 2791
Change-Id: I27a538d5b4485ccaded8ec0aa33f5e7797bc1503
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
diff --git a/lib/commons/BUCK b/lib/commons/BUCK
index fe249fa..155baad 100644
--- a/lib/commons/BUCK
+++ b/lib/commons/BUCK
@@ -82,8 +82,8 @@
 
 maven_jar(
   name = 'validator',
-  id = 'commons-validator:commons-validator:1.4.0',
-  sha1 = '42fa1046955ade59f5354a1876cfc523cea33815',
+  id = 'commons-validator:commons-validator:1.4.1',
+  sha1 = '2231238e391057a53f92bde5bbc588622c1956c3',
   license = 'Apache2.0',
 )