Workflows for FMU: ranking of realizations
Added const to argument
 Names changed
Removed check
Fixed typing error in workflow job
Added test case
Added EXPORT_RANKING workflow, and removed file write from EXPORT_RANKING and OBSERVATION_RANKING  workflows. Also changed step parameters for OBSERVATION_RANKING workflow to take a range and/or comma-separated list
Making sure that we do not recalculate the misfit table unconditionally
Added job INIT_MISFIT_TABLE
Removed unused variables
Fixed programming error in enkf_tui_ranking.c: Forgot to init char *
Added const to int_vector_type * steps variable
Moved include to proper place in include list
Added const to argument
Using input argument @test_name for the ert_test_context test_area
Merge pull request #357 from chflo/ranking_workflows

Ranking workflows
ERT-421: Modififying the call to enkf_main_init_run() in many tests: NULL input argument is no longer allowed.
ERT-421: More fixes NULL -> bool_vector instance in enkf_main_init_run() calls.