[TESTING TOOLS] Create a testing tools package to let developers easily create tests

[LaiaPerez88]

Create a testing tools package to let developers easily create tests.

[davidverdu]

Can we have more details for this issue implementation @boostercloud/booster-core ? Maybe creating an external repository with these testing functions? these functions should help programmer testing Booster abstractions?

[NickSeagull]

I think this fits more a discussion than an issue, as its more for brainstorming and coming up with ideas. Converting into a discussion