tweak bios_settings to work with strings
tweak bios_settings to work with strings

When running through puppet apply with a manifest generated by
yaml2manifest.rb, the bios settings come through as strings
rather than booleans.  This fixes up the munging to work with
string values of true and false

asaenz/dell-idrac,asaenz/dell-idrac,logankimmel/dell-idrac,logankimmel/dell-idrac,dell-asm/dell-idrac,dell-asm/dell-idrac