JCLOUDS-457: Test groups and improvements

Test groups have been added. Also, the live tests were
refactored to reduce the number of RPCs.
JCLOUDS-457: Add JobStatus enum

Now the job status is stored as an enum instead of
a String. This is useful when comparing the status to
check if a job is completed, failed or still in progress.
JCLOUDS-457: Long live tests

The long live tests have been added. These tests takes several
hours and may leave traces in your AWS account, use them carefully