Closes m88i#12 - Introducing fake client (m88i#17)

* Closes m88i#12 - Introducing fake client 🙈

Signed-off-by: Ricardo Zanini <ricardozanini@gmail.com>

* Add Maven Repository services fake

Signed-off-by: Ricardo Zanini <ricardozanini@gmail.com>

* Fixing Maven proxy repo bug

Signed-off-by: Ricardo Zanini <ricardozanini@gmail.com>

* Writing documentation

Signed-off-by: Ricardo Zanini <ricardozanini@gmail.com>

Closes m88i#7: add API check for Non Groovy scripts capabilities (m88i#8

)

* Closes m88i#7: add API check for Non Groovy scripts capabilities

Signed-off-by: Ricardo Zanini <ricardozanini@gmail.com>

* Applied review comments and increase unit test

Signed-off-by: Ricardo Zanini <ricardozanini@gmail.com>