[INTERNAL][FIX] sap.m.Bar Parameter's type for setHTMLTag method removed

- The parameter passed to setHTMLTag does not match IBarHTMLTag options
any longer, thus allow for any tag without any validation nor failure
logging. Added unit test for this.
  
 - Fixed the other, related to this method unit tests, as they pass but
does not test the correct behavior. 
- Minor changes to the other tests (unused variables, comments, etc.)

Change-Id: I439a58cd369624cdde4e5b5c6381cd693f6d40dd
Merge "[INTERNAL][FIX] sap.m.Bar Parameter's type for setHTMLTag method removed"