I had been dealing with these intermittent failures for a while and
finally figured out why. The real solution is making genproto.sh less
ugly but that won't happen for a while.
Fixes scripts and removes shellcheck warning suppressions.
* regexp warnings
* use ./*glob* so names don't become options
* use $(..) instead of legacy `..`
* read with -r to avoid mangling backslashes
* double quote to prevent globbing and word splitting
'glide vc --no-tests' flag removes 'testify/assert' deps
in v2 client. Until we deprecate v2 tests, just copy the
necessary files as workaround.
And remove '--skip-tests' flags in case we add dependencies
in test files.
