Add new behavior for working with new attribute

 - new attribute is 'memberOfPerunVo'
 - attirbute is type of 'integer'
 - attribute is multivalue
 - Main method will generate these value for User objects
 - LDAPc will add and remove all these values by the same behavior like
   adding and removing value memberOf
Merge pull request #481 from stavamichal/ldapcNewAttributeMemberOfVo

Add new behavior for working with new attribute