Added base64 encoding for user-data
Added get_userdata to EuInstance class; added UserData testcase to instancetest.py to confirm if userdata gets translated correctly when pulling from http://169.254.169.254/latest/user-data
Moved sudo resolution fix to better location.  See https://github.com/hspencer77/eutester/commit/92fe9ce9cb0831d82aef17370e5806c62b52858b for details
Took out the extra base64 encoding.  Wasn't needed sync boto takes care of it.
Merge pull request #161 from hspencer77/user-data-fix

Added testcase and support for testing userdata