Fixing ssl_cert task error message

If you run `rake ssl_cert` without arguments it fails on .gsub method, 
this should be done after the check 
Bump the version number for 11.6.0.rc.3
Regenerate docs for 11.6.0.rc.3
[CHEF-4380] Fix missing include on shellout mixin
Merge pull request #900 from opscode/CHEF-4380

[CHEF-4380] Fix missing include on shellout mixin
Bump chef version to 11.6.0.rc.4
Regenerate docs for 11.6.0.rc.4
Use progress formatter on Travis
Add timeout attribute to scm resource
Use timeout attribute in git and subversion providers
Update the deploy resource to meet extended scm interface
Update specs to encompass scm timeout attribute
Remove stray :focus from spec
Fix botched rebase
Add spec for new timeout attribute on deploy resource
Extend deploy provider spec to cover timeout
Bump version to 11.6.0 for GA Release
Fix CHEF-4419 by appending a drive letter from the current working directory to the path if it starts with '/' in the most common code path we're encountering this issue.
get first gem.bat in path rather than last
Merge pull request #926 from opscode/CHEF-4419

CHEF-4419: Absolute file paths with no drive letter for file resources on Windows fails chef-client run