PUSH-238 Modified BlockingConnectionServer to respond with a custom server-error message in case an exception is captured during blocking request processing. The server error response sent to the bridge will trigger a re-try executed by the bridge (a number of times, depending on the configuration).

git-svn-id: http://anonsvn.icesoft.org/repo/icepush/trunk/icepush@35196 1de00972-ac04-4911-a46b-06793c8d78d9
PUSH-238 Remove stack trace and exception class name from the response since they can become a security breach in certain deployments.

git-svn-id: http://anonsvn.icesoft.org/repo/icepush/trunk/icepush@35206 1de00972-ac04-4911-a46b-06793c8d78d9