Ensure that 'cpus' and 'memory' are always defined (HTCONDOR-243)
Ensure that 'cpus' and 'memory' are always defined (HTCONDOR-243)

Otherwise, their references will be undefined, even with their own
default values, e.g. $(mem:1) resulted in undefined OriginalMemory
and remote_OriginalMemory attributes

matyasselmeci/htcondor-ce,brianhlin/htcondor-ce,brianhlin/htcondor-ce,matyasselmeci/htcondor-ce,brianhlin/htcondor-ce,matyasselmeci/htcondor-ce