Integrate new booster catalogue format in launcher PR command

[aureamunoz]

The catalogue format has changed --> https://github.com/fabric8-launcher/launcher-booster-catalog/commit/0f55e29fa19056b13abb155be08d78591709e2a4

We need to adapt our script in order to be able to update the new format catalogue.

[gytis]

https://github.com/snowdrop/snowdrop-automation-client/pull/38