SHDP-413 Remove build support for CDH 4
SHDP-355 - Remove any Hadoop v1/v2 specific code

- changing job-tracker-uri to job-history-uri

- removing fs.default.name replacing with fs.defaultFS

- removing Windows hack for tests
SHDP-355 - Remove any Hadoop v1/v2 specific code

- removing VersionUtils
SHDP-355 - Remove any Hadoop v1/v2 specific code

- clean up imports
SHDP-355 - Remove any Hadoop v1/v2 specific code

- update MapReduce example link
SHDP-416 Change extension used for bzip2 and gzip