AJP client + lots of AJP fixes

This allows Undertow to proxy via AJP
Fix potential race in JDBCLogHandler
Test AJP in the proxy profile
Just force close the connection on proxy timeout
Add principal vs role map to deployment info
WFLY-1888 also load ServletExtension-s from parent class loader so that other modules can export services and add their own Handler-s
Change ServletExtension check to make sure they are not executed twice
1.0.0.Beta8
Next is 1.0.0.Beta9
Some more work on the proxy implementation
Fix issue with AJP request parsing of SSL requests
Many AJP improvements
Propage SSL information
Fix buffer handling
Use transfer for large files
Minor clean up
Fix issue with FileResourse and transfer
Add SingleByteStreamSinkConduit for better testing of async write behaviour
Add SingleByteStreamSourceConduit to better test resume reads behaviour
Add X-Forwarded-For header in proxy handler