Error downloading app #4
Description
In order to avoid error below, i suggest having a null check for this.outputPath on removeOldApp()
[2016-12-31T10:37:19.170Z][m75199] downloading app
[2016-12-31T10:37:19.170Z][m75199] fetching current app version from fastboot-test/fastboot-deploy-info.json
[2016-12-31T10:37:19.429Z][m75199] got config { bucket: 'fastboot-test', key: 'dist.zip' }
[2016-12-31T10:37:19.431Z][m75199] removing
[2016-12-31T10:37:19.432Z][m75199] Error downloading app
[2016-12-31T10:37:19.433Z][m75199] AssertionError: rimraf: missing path