Ansible launcher: make get_env safer
Ansible launcher: make get_env safer

Previously, this function would fail on lines with comments.

Change-Id: I694281777e6d8a51ceb943f8656189e75544ab05

gooddata/zuul,wikimedia/integration-zuul,gooddata/zuul,gooddata/zuul,gooddata/zuul,wikimedia/integration-zuul,wikimedia/integration-zuul,wikimedia/integration-zuul,gooddata/zuul