Feature 5497

Add favorite application / space using new mylinks REST service.
Modify viewLinks in order to use REST service
You also have to merge Silverpeas-Components pull request.

Be careful, I have made some mistakes when I have changed my git config ssh key. That's why there are a lot of commits. More over two files have been pushed which came from another branch feature :
- lib-core/src/main/java/com/silverpeas/util/StringUtil.java
- lib-core/src/test/java/com/silverpeas/util/StringUtilTest.java

Please let me know if I need to change my pull request.