Expands cleanup action to handle dev VMs

More comprehensive "make clean" behavior, including removal of:

  * Vagrant VMs
  * Molecule VMs
  * temporary git repos cloned by Molecule (for upgrade testing)
  * git-clean even gitignored directories

The output is fairly verbose, so it's obvious to the developer what's
been changed in the environment.

devops/clean

@@ -15,19 +15,33 @@ function remove_unwanted_files() {
         install_files/ansible-base/mon-ssh-aths \
         build/*.deb
 
+    # Remove extraneous copies of the git repos, pulled in
+    # via the Molecule upgrade testing scenario.
+    rm -rf molecule/upgrade/.molecule/sd-orig \
+        molecule/vagrant_packager/.molecule/sd-orig
+
     # Python bytecode, left over from tests or local app runs.
-    find -type f -iname '*.pyc' -delete
+    find "$PWD" -type f -iname '*.pyc' -delete
 
     # Ansible playbook retry files, which are never used.
-    find -type f -iname '*.retry' -delete
+    find "$PWD" -type f -iname '*.retry' -delete
 
     # Static assests generated by local dev, as well as
     # virtualenv for securedrop-admin script.
     rm -rvf securedrop/static/.webassets-cache .venv
 
-    # Any and all git-ignored files, if present. Includes e.g.
-    # deb packages in build/
-    git clean -f -x
+    # Any Vagrant VMs should be destroyed. We check for the .vagrant/
+    # directory, because it'll be created by vagrant otherwise, breaking
+    # idempotence for the cleanup action.
+    if hash vagrant &> /dev/null && [[ -d .vagrant/ ]]
+    then
+        printf "Removing vagrant VMs\\n"
+        vagrant destroy -f > /dev/null
+    fi
+
+    # Any and all git-ignored files and directories, if present. Includes e.g.
+    # deb packages in build/, and VM information stored locally.
+    git clean -x -d -f
 }
 
 
@@ -42,7 +56,6 @@ WARNING_MESSAGE
     # We want to avoid mistakes here, so force developers
     # to type 'yes' in order to confirm and proceed with cleanup.
     read -r -p "To proceed, type 'yes': " user_confirmation
-    printf "\\n"
     case "${user_confirmation}" in
         yes ) remove_unwanted_files;;
         * ) printf "Action declined, exiting...\\n"