Add logging

[bdunne]

Add logging to LinuxAdmin to help in debugging.

Also, set AwesomeSpawn logger if it isn't already set

https://bugzilla.redhat.com/show_bug.cgi?id=1069247

[bdunne]

@Fryguy Please review

[miq-bot]

Checked commits bdunne@eb9c6c4 .. bdunne@98ce6b8 with rubocop 0.27.1
8 files checked, 1 offense detected

lib/linux_admin.rb

• 🔶 - Line 33, Col 3 - Style/ModuleFunction - Use module_function instead of extend self.

[coveralls]

Coverage increased (+0.01%) to 99.32% when pulling 98ce6b8 on brandondunne:add_logging into 0019009 on ManageIQ:master.

[Fryguy]

👍