[Libvirt-cim] [PATCH 0 of 3] [CU] Standard Indication goes to eleven

Serious re-vamp of the std_indication code. I pulled as many things as possible out of the providers and into std_indication. This helps keeps the code base small as the number of indications grows, plus makes the task of writing a new indication a bit more approachable. Changes are detailed in the patchsets.