analytics - extractorapp: replace the Ext.js git submodule by a webjar

[groldan]

Webjars (https://www.webjars.org/) are client side JS
libraries packaged into a .jar file.

According to the documentation for servlet 3 apps
(https://www.webjars.org/documentation#servlet3) we just need
to add the required dependency.

This patch replaces the Ext.js git submodule by the extjs
4.1.1a jar dependency in both extractorapp and analytics,
saving ~500M of disk space in the developer's source code
checkout.

[pmauduit]

I'm not a ExtJS / Frontend expert, but I'm pretty sure we sometime use a fork of Extjs or whatever JS lib. this sounds promising though, is there a way to have a maven module when we need customizations of these libs ? (which would generate a georchestra-extjs-whatver-webjar.jar)

[groldan]

yes, generating a webjar is really simple and can be done with a maven project that saves static resources under META-INF/resources/webjars/<library name>/<version>.
As for using them, there's an locator dependency that can be added to resolve the installed version so you don't need to set it in the import paths (e.g. src="extjs/ext.js would automatically resolve to extjs/<installed version>/ext.js.

[fvanderbiest]

Sounds very interesting Gabriel !
Please update the branch, there are conflicting files.