CONN-136 prepare regression suite for auto run via Maven

added pom files to the individual regression directories

update of poms

deleted unused msgproxy versions of tests, as well as Gateway-2187 project

incorporated 4.0 updates into atomic_regression

final atomic_regression check-in
change 4.0.0-SNAPSHOT to 4.1.0-SNAPSHOT

turned off one regression test
Merge pull request #414 from matthewtiller/atomic_regression

CONN-136 prepare regression suite for auto run via Maven