Simplify % filtering

We can do this when generating the array and not separately later.

Signed-off-by: Michal Čihař <michal@cihar.com>
Factor out language specific checks to separate methods

Signed-off-by: Michal Čihař <michal@cihar.com>
Revert "Use sauce_connect addon instead of manual execution"

This reverts commit 9013e2f177abab8b0260531784c444e7e4f1d8bf.

Manual execution can be conditional so that it does not slow down normal
builds.

Conflicts:
	.travis.yml