gitlab-charts-build-base: upgrade kubectl to 1.10+
The following discussion from !172 (merged) should be addressed:
-
@WarheadsSE started a discussion: We'll need to update this as well.
1.9.x
is quite out of date. We should move to ~1.10.x
at least, if not1.11.x
cc @ebrinkman @twk3