Jordan Petridіs authored Jul 01, 2019 and Xavier Claessens committed Aug 16, 2019

* Install git-lfs as its required now by gst-integration-suites
* Clone gst-build eache time to avoid dated gst-build checkouts
and overwritting .wrap files. Similar to !137
* Split the dockerfile and add a second run stage refresh the
powershell env inbetween calls
* Remove the msys2 workaround as its not needed anymore