Clean up packages folder at the end of the "bosh create-env".

If we don't clean the packages and the paas-bootstrap project uses a different version we can get "idempotent" issues.

For example:

mkdir: cannot create directory '/root/.bosh/installations/44f01911-a47a-4a24-6ca3-a3109b33f058/packages/aws-cpi-ruby-3.1/bosh': File exists

bosh-cli-v2/bosh-cli-v2_spec.rb

@@ -99,7 +99,5 @@
 
     cpi_package = compiled_packages.find {|p| p["Key"]["PackageName"] == "bosh_aws_cpi" }
     expect(cpi_package).to be
-
-    expect(file("#{installation_path}/packages/bosh_aws_cpi/bin/aws_cpi")).to be_executable
   end
 end

bosh-cli-v2/bosh_init_cache/seed_bosh_init_cache.sh

@@ -23,4 +23,9 @@ set +e
 bosh create-env minimal.yml
 set -e
 
+# We only care about the compiled_packages.json and blobs folder.
+# Keeping this about can cause issues if the cpi has packages that
+# are not idempotent.
+rm -r /root/.bosh/installations/44f01911-a47a-4a24-6ca3-a3109b33f058/packages
+
 echo "...done"