Unable to disable multiple collectors.

[Houlistonm]

dmi
fibrechannel
nvme
os
selinux
tapestats

Are enabled by default unless specifically disabled by command line switches.
Update the templates + spec + tests to allow these collectors to be disabled if desired.

[benjaminguttmann-avtq]

@Houlistonm are you interested in providing the respective PRs ?

[Houlistonm]

@benjaminguttmann-avtq Not at this time unfortunately, current contract/job ends this week and starting a new contract/job next week. Future changes will depend on my new workload.