Description of problem:

While testing bz 1468388 i noticed that the ~ operator is not handled properly 


Version-Release number of selected component (if applicable):


How reproducible: Always


Steps to Reproduce:
1. Create multiple users (eng-user1, eng-user2, bob, sam)
2. Perform some tasks with each of the users. 
3. Monitor -> Tasks. 
4. Search user ~ eng

Actual results: 
Empty search results 


Expected results: 
Tasks run by users with "eng" anywhere in their user name are returned. See docs [1] "... If no wildcard is specified, the string is treated as if surrounded by wildcards: %rhel7%"


Additional info:
The workaround here is to add wildcards to the search like:
user ~ eng-*

This could be an issue for customer who use usernames that contain other information they wish to search on, other then a literal username. For example all service accounts may be prefixed by "serv-servname-".