another attempt to fix update-version.sh script (#356)

* another attempt to fix update-version.sh script

might be ugly and very limited.... but should work....

* Update update-version.sh

Author: dariuszkuc

.travis/update-version.sh

@@ -26,7 +26,7 @@ commit_files() {
     git checkout -b ${NEW_VERSION}
 
     # Stage the modified files
-    git add ./**/pom.xml
+    git add -A
 
     # Print the current files we are going to commit
     git status