The unit test added to cover #7233 was causing changes to show up in git
when tests were ran. This was due to the dependency build creating a new
tarball. These changes would cause a dirty build when we build our major
versions, so I removed the subchart tarball from git and added the charts
folder for that test chart to the gitignore to avoid any future problems.
Based on all I can see, this should have any impact on the test itself
Signed-off-by: Taylor Thomas <taylor.thomas@microsoft.com>