[BZ-1013682] fix DRL to RuleModel unmarshalling
 - adding no-arg constructor to GetVariableCommand so that it can be serialized
(cherry picked from commit 9f9d41aeac275ec277c1329546fde35d80aacb21)
Added test for the case where to rules with the same name are created in the same DRL file.
[DROOLS-298] allow to set a custom maven setting file
BZ-1013682 - GRE doesn't recognize formulas, calls on globals, etc. when reopening rule
BZ1009369 - Creating an asset removes all info from Problems tab
BZ-1007894: Resolve projject dependencies on build. If any depedency is not resolvable, an error is showed in the user console (rather than old behaviour - > trowing a NullPointerException to the client, the error was not friendly or clear for the user)
[BZ-1009348]-IndexOutOfBoundsException is thrown, when operator and is inside conditional element not
-The queue is now initialised in the outer PathMemory and the same instance is trickled up to all inner PathMemories
[DROOLS-300] add start and end params to timers
[BZ-1009369] fix incremental compilation when an empty resource is added
[BZ-1013682] fix rule model to drl marshalling of formula fields