Persist/remove apps data in the apps portion of the portal config

[romer8]

• [x] 100% coverage
• [X] App_settings command persist changes in the app portion for specific app
• [x] App_settings has new flag -W (needs to be approved, what do you think)
• [X] Install command persists changes in the app portion for specific app
• [X] Install command has new flag -W (needs to be approved, what do you think)
• [X] Uninstall command removes changes in the app portion for specific app
• [x] Link command persist changes in the apps portion for specific app

The flags are in case that we dot want to persist the state of the app with every change. For example in development mode maybe the user does not want to persist the apps setting, services. Another situation can be that we only want o used in a docker deployment or CI

[coveralls]

coverage: 100.0%. remained the same when pulling 1fa4cd5b7855e3082eab88fe019e21de134e8d81 on romer8:keeping_apps_state into fbb8f7fb94f63caa0d80cdf0d87bc5491a875890 on tethysplatform:main.

[swainn]

I believe we've decided we aren't going to move forward with this approach.