Update test suite for execution in environment without RMS

[koomie]

Given that we are starting to publish some minimal container images, it would good to be able to run a subset of the integration test suite within these containers. The primary blocker for this is the assumption that a resource manager is running locally.

Since we have abstracted the job execution with run_serial_binary and run_mpi_binary, we could add an option that indicates no RMS is available and to just run on head node (or skip altogether).