Bumps sha for sprout-git

Updates projects attributes to use new hash based syntax
[#62184140]
Merge pull request #56 from pivotal-sprout/wip/sprout_git_bump-62184140

Bumps sha for sprout-git
Removes Xcode install step

It seems that all we need are the command line tools installed.

Also:
- Updated the gem install step to use sudo for the bundle 
  since the expectation is that they are running on system ruby
- Updates the expected time it takes to do a full soloist 
  run from 2-3 hours to 10 minutes to 2 hours because it seems 
  to take about that long these days if one has a good network 
  connection.
Updates librarian-chef and Cheffile site

[#75083494]
Revert "Updates librarian-chef and Cheffile site"

This reverts commit 3e312c1774b989ed0766f1623082fbbd15e023ac.
Updates only librarian-chef not it's dependencies

Uses bundle update --source=librarian-chef which will only update the source gem and required dependencies, not all depenencies. There is an issue with json versions when all dependencies are updated.  Something to do with json 1.8.1 and 1.7.7

Also updates the cheffile site.
Merge pull request #57 from pivotal-sprout/update-librarian-chef-75083494

Updates only librarian-chef not it's dependencies

Uses `bundle update --source=librarian-chef` which will only update the source gem and required dependencies, not all depenencies. There is an issue with json versions when all dependencies are updated.  Something to do with json 1.8.1 and 1.7.7

Also updates the Cheffile site.
[#75083494]
Merged with upstream/master