Remove depended dependencies, upgrade jackson-mapper-asl to 1.9.11

Hello all, 

I've removed from core/pom.xml all dependecies, which could be reached from other projects.
Also I've upgraded version of jackson-mapper-asl, because this version is used by google-http-client-jackson.

List of used libraries is still the same, the only change is 
[INFO]    org.codehaus.jackson:jackson-core-asl:jar 1.9.9 => 1.9.11
[INFO]    org.codehaus.jackson:jackson-mapper-asl 1.9.9 => 1.9.11

Please review this simple change.

            thanks

                       vlk