[RXCE]

[RXCE]
- Define RxShouldPostCompletion() and use it
- Define RxIsResourceOwnershipStateExclusive() and use it
- Define some magic values

[RDBSS]
- Implement CheckForLoudOperations(), RxAdjustFileTimesAndSize(), RxIsOkToPurgeFcb()
- Continue implementation of RxCommonCleanup()
- Fix bugs in the RxCommonCleanup() implementation and make it more explicit when in the delete on close path
- Stub RxCleanupPipeQueues(), RxLowIoLockControlShell()
- Silent a few DPRINTs

CORE-8204
CORE-11327

svn path=/trunk/; revision=75307