Fix Circle-CI configuration

[Asone]

Circle-CI configuration is broken. We should write a config file that handles the same build process used for Travis :

• Environment dependencies
• Angular & Ionic unit testing
• Ionic building for android

[Asone]

Current configuration fix is blocked by an outdated node-sass package dependency declared in @ionic/app-scripts.

The provided docker-image on circle-ci currently requires node-sass to call an non-existent node binding which leads to 404 HTTP. Building from sources fails also due to missing python2 dependency.

A PR is opened here to update the node-sass package declaration so node-sass can rely to an existing node binding.

[Asone]

PR has been merged and node-sass dependency for alpine image is fixed. see here.

We can now proceed to further steps of configuration

[Asone]

CI seems stuck on chrome launch for testing. We'll need to configure this step in order to be able to process the tests batch before getting to the ionic build step.

[Asone]

Fixed tests. However, test process is triggered with the default environment configuration. We should see how to detect circleci environment in order to pass the same paraters as for travis.

Once done, only ionic build will be left in order to validate CI.

[Asone]

Concurrency fixed. Build seems to work. Last fix to provide is to remove a local Plugin that shouldn't be brought to the current repo from sources and avoid it to be called in CI.

Once done, PR will be opened to merge

[Asone]

circle-ci build seems successful see here as travis ci also.

Opening PR.

[Asone]

PR tests & builds successful on Travis and Circle-CI. PR Merged . Closing issue.