Switch from mocha to rspec mocks #192

Job	Run time
RELENG checks	27s
File checks	28s
Puppet Style	37s
Puppet Syntax	27s
Ruby Style (experimental)	0s
Spec (classes 01, Puppet 7.x [SIMP 6.6/PE 2021.7])	30m 36s
Spec (classes 10, Puppet 7.x [SIMP 6.6/PE 2021.7])	19m 3s
Spec (classes 20, Puppet 7.x [SIMP 6.6/PE 2021.7])	33s
Spec (classes 00, Puppet 7.x [SIMP 6.6/PE 2021.7])	8m 53s
Spec (facter, Puppet 7.x [SIMP 6.6/PE 2021.7])	41s
Spec (functions, Puppet 7.x [SIMP 6.6/PE 2021.7])	38s
Spec (aliases, Puppet 7.x [SIMP 6.6/PE 2021.7])	50s
Spec (unit, Puppet 7.x [SIMP 6.6/PE 2021.7])	39s
Spec (classes 01, Puppet 8.x)	30m 34s
Spec (classes 10, Puppet 8.x)	19m 49s
Spec (classes 20, Puppet 8.x)	29m 24s
Spec (classes 00, Puppet 8.x)	9m 2s
Spec (facter, Puppet 8.x)	20s
Spec (functions, Puppet 8.x)	29s
Spec (aliases, Puppet 8.x)	20s
Spec (unit, Puppet 8.x)	22s
	2h 34m 12s

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