Add deploy_modules method to fabric tools

[pbchase]

Module updates that are done using Fabric tools have a tedious, multi-step workflow as shown here.

The fabric tools could benefit from a task designed to deploy and enable a module from a code release. See the green text above.

[pbchase]

This issue could be broken down into as many as four releases in a series of incremental improvements. That series might look like this:

Deploy and enable one module. This is the minimally functional feature.

• get_latest_release_tag (on github)
• get_latest_release_zip (download it from github to local)
• deploy_module_from_release (upload release zip to host and expand it in the redcap modules directory with an appropriately named and versioned directory. e.g., auto_populate_fields_v2.3.0)
• deploy_module (a fabric task)
• enable_module (a fabric task)

Deployment Usage:

fab vagrant deploy_module:ctsit/imagemap
fab vagrant deploy_module:ctsit/imagemap,1.2.1
fab vagrant deploy_module:ctsit/imagemap,,0.0.0
fab vagrant deploy_module:ctsit/imagemap,1.2.1,0.0.0
fab vagrant deploy_module:'https://github.com/ctsit/imagemap

Enable Usage:

fab vagrant enable_module:imagemap
fab vagrant enable_module:imagemap,0.0.0
fab vagrant enable_module:imagemap,1.2.1
fab vagrant enable_module:'https://github.com/ctsit/imagemap'

Deploy and enable multiple modules. This feature would be driven by the existing modules.json. It would be implemented via these methods.

• get_module_list
• deploy_modules
• enable_modules

Deploy and enable only as needed. This is an incremental deployment and enabling of modules. It would require these methods:

• get_deployed_modules
• get_enable_modules

Additionally, the deploy_modules and enable_modules methods would need to be revised to consume the inputs acquired by these modules and not deploy or enable where that work was already done.

Deploy pre-release code. It might be useful to test unreleased code in a non-local environment. To do that we would need a method, deploy_module_from_directory.

[pbchase]

To get the inputs for get_latest_release_tag and get_latest_release, consider these examples:

# to enumerate releases in json
curl -L -s 'https://api.github.com/repos/ctsit/redcap_webservices/tags'

# to download a release
curl -L -s https://github.com/ctsit/redcap_webservices/archive/1.0.3.zip -O