Expose load_commands publicly

This will allow us to load commands from other entrypoints into the
list. It brings together the two CommandManager overrides in tests into
one place in utils to simply usage.

Change-Id: Ib463eff98c2ac04488ce4a8875cf3e1b7779b27c
fixed typos found by RETF rules

rules are avaialble at https://en.wikipedia.org/wiki/Wikipedia:AutoWikiBrowser/Typos

Change-Id: I1ecf1b48d82c71ef12cf419540740aac2d64bb56
Merge "fixed typos found by RETF rules"
Merge "Expose load_commands publicly"