The current code has incomplete support for job arrays - only the
primary job identifier is shown. This change adds a new internal parameter
called provider_job_id which contains the `job index` for non-array
jobs and the `base_job_index[array_index]` for array jobs.

There is a corresponding pull request for the xmdod-supremm module
and for the xdmod-xsede module that should all be merged at the same
time.

The xdmod-supremm module build has been updated to check for
errors/warnings. Needless to say I found some.

The default value for the font size must be a numeric string - and
not a text string.

Add some checks for data validity and hoy out an execption if the
checks fail.