Add new searcher for searching Members by user attributes

- add method which use existing userSearcher, but returning members by
  specified vo
- add tests for new method
- fix some bugs in existing tests in Searcher
- add privileges test for new method
- add privileges test for all userSearcher methods (Entry)
- fix javascript
- remove some useless code
Merge pull request #413 from stavamichal/attributeSearcherForMembersUsingUserAttributes

Add new searcher for searching Members by user attributes
New altPasswordManager

- also added new return code into the description in perun.passwordManager
Fix method getGroupByName to use fullName of group

- return always only 1 group if exists and use fullName of group for
  searching
- add info to javadoc
- add regex for testing variable name of group in method getGroupByName
- add test for more than one groups with the same shortName but
  different Name
- fix formating of two existing tests (getGroupByNameWhenGroupNotExists
  and getGroupByNameWhenVoNotExists)
Merge pull request #415 from stavamichal/fixMethodGetGroupByName

Fix method getGroupByName to use fullName of group