Create explicit GC ordering between ConnectionFairy/ConnectionRecord

Create explicit GC ordering between ConnectionFairy/ConnectionRecord

Fixed issue where connection pool would not return connections to the pool
or otherwise be finalized upon garbage collection under pypy if the checked
out connection fell out of scope without being closed.   This is a long
standing issue due to pypy's difference in GC behavior that does not call
weakref finalizers if they are relative to another object that is also
being garbage collected.  A strong reference to the related record is now
maintained so that the weakref has a strong-referenced "base" to trigger
off of.

Fixes: #5842
Change-Id: Id5448fdacb6cceaac1ea40b2fbc851f052ed8e86