Clusters set auto_cores max

[ashton22305]

Work on #3755

[johrstrom]

Looks like tests are failing because we didn't stub sinfo.

You can take a look here on how we stub scontrol to get partitions.

ondemand/apps/dashboard/test/test_helper.rb

Lines 89 to 96 in 3cc4910

	def stub_scontrol
	['owens', 'oakley'].each do |cluster|
	Open3
	.stubs(:capture3)
	.with({}, 'scontrol', 'show', 'part', '-o', '-M', cluster.to_s, stdin_data: '')
	.returns([File.read("test/fixtures/cmd_output/scontrol_show_partitions_#{cluster}.txt"), '', exit_success])
	end
	end

[johrstrom]

LTGM