Use integer conversion for Cpus and Gpus

[djw8605]

The CPUs and GPUs are floats, for some reason. Convert to integer
which makes it easier to parse with python classad bindings (for example
in the gratia probe)

The gratia probe reads MATCH_EXP_JOB_GLIDEIN_Cpus.

I am open to opinions.

[timtheisen]

So, in the near future we will be allocating fractional GPUs. And, allocating fractional CPUs in on the road map. What is the difficulty in parsing with the Python ClassAd bindings? Is there a bug there that we need to fix?

[tannenba]

Seems like a problem that the probe relies on MATCH_EXP_JOB_GLIDEIN_Cpus, which is not ensured to be there. The job should explicitly request to have attributes from the matching ad (slot ad) inserted into the job ad. As for converting to int, the patch looks simple enough, but we are wondering.... how does it become easier to parse with ClassAd bindings? Or perhaps you meant easier to parse without bindings? Or easier to work with? Thanks.