Add CDH4.2 profile and bump to v1.1.0-SNAPSHOT.

kiji-platforms v1.1.0 adds a cdh4.2-based platform, kiji-cdh4-2-platform.
The kiji-cdh4-platform is now CDH 4.2-based.
Use the kiji-cdh4-1-platform if you require the latest CDH 4.1 revision.