[OOM] Skip faulty install of helm2 stable repo

Stable repo is not the right one and we also don't need it here for
linting.
So let's remove it at start.

Issue-ID: OOM-1
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: I2cdd105bf40c588bcea536fcb4af54ba54cdac14
1 file changed