CRM-17846 Fixing lock name to be less than 64 characters for MySQL 5.7 compatib...

CRM-17846 	Fixing lock name to be less than 64 characters for MySQL 5.7 compatib (#8133)

* Fixing lock name to be less than 64 characters for MySQL 5.7 compatibility

Removing spaces to make Jenkins happy

Updating Lock to keep the name param and add an id to use for the actual lock

Fixing spacing/comment issues

Using lock id instead of  when checking if lock used

Changing behaviour when a lock is attempted using an existing name so as to return FALSE and leave the _hasLock FALSE

Revert "Changing behaviour when a lock is attempted using an existing name so as to return FALSE and leave the _hasLock FALSE"

This reverts commit 4fcb4d2f5b161c69a4f86f09ac363e97791f023e.

* CRM-17846 further fix to make lock mechanism work

* CRM-18746 add Code Comments