Use file:// prefix for blobstore_path like configure_micro_bosh.sh

This makes configure_micro_bosh_for_mcf.sh & configure_micro_bosh.sh more similar.
Merge pull request #151 from drnic/blobstore_for_mcf

Use file:// prefix for blobstore_path like configure_micro_bosh.sh
Made integration tests compatible with parallel_rspec
[#48749497] rake tasks to publish candidate gems and microbosh release to S3
[#48749497] Use BUILD_NUMBER rather than FLOW_NUMBER for setting the release filename