libjob: support virtual states in conversions

Problem: It would be convenient if virtual job states of "pending",
"running", and "active" could be parsed and handled by flux_job_statetostr()
and flux_job_strtostate().

Solution: Add virtual states to the table of states that can be parsed
and handled by flux_job_statetostr() and flux_job_strtostate().  Update unit
tests for coverage as well.

Author: chu11

src/common/libjob/state.c

@@ -26,6 +26,9 @@ static struct strtab states[] = {
     { FLUX_JOB_STATE_RUN,       "RUN",      "run",      "R", "r" },
     { FLUX_JOB_STATE_CLEANUP,   "CLEANUP",  "cleanup",  "C", "c" },
     { FLUX_JOB_STATE_INACTIVE,  "INACTIVE", "inactive", "I", "i" },
+    { FLUX_JOB_STATE_PENDING,   "PENDING",  "pending",  "PE", "pe" },
+    { FLUX_JOB_STATE_RUNNING,   "RUNNING",  "running",  "RU", "ru" },
+    { FLUX_JOB_STATE_ACTIVE,    "ACTIVE",   "active",   "AC", "ac" },
 };
 
 

src/common/libjob/test/job.c

@@ -241,6 +241,9 @@ struct ss sstab[] = {
     { FLUX_JOB_STATE_RUN,      "R", "RUN", "r", "run" },
     { FLUX_JOB_STATE_CLEANUP,  "C", "CLEANUP", "c", "cleanup" },
     { FLUX_JOB_STATE_INACTIVE, "I", "INACTIVE", "i", "inactive" },
+    { FLUX_JOB_STATE_PENDING,  "PE", "PENDING", "pe", "pending" },
+    { FLUX_JOB_STATE_RUNNING,  "RU", "RUNNING", "ru", "running" },
+    { FLUX_JOB_STATE_ACTIVE,   "AC", "ACTIVE",  "ac", "active" },
     { -1, NULL, NULL, NULL, NULL },
 };