Update service_object.rb

Removing "-i" option from sudo command in order to get rid of "stdin: is not tty" warning (this warning is harmless but messing up parsing of xml file with tempest run results)
Update service_object.rb

Minor typos fixed
Merge pull request #11 from MirantisDellCrowbar/BUG/DCB-159/release/pebbles/master

merging fix for "Bug/dcb 159/release/pebbles/master"