Fix bug #1277002 - inconsistent API output for job status.
Fix bug #1277002 - inconsistent API output for job status.

Return the display value of job status instead of the magic number.

Change-Id: I0e671eea18dd1444e2a075368874915002402bbf

OSSystems/lava-server,Linaro/lava-server,Linaro/lava-server,Linaro/lava-server,OSSystems/lava-server,OSSystems/lava-server,Linaro/lava-server