Don't ignore test results without FEATURE

[kam193]

When no FEATURE is passed to make test, results of test shouldn't be ignored. At this moment, any test result is ignored and CI can't catch errors - they are stored in log, but not showed in status.

[kawazaki0]

Here is the source of the problem https://github.com/codilime/acid/pull/54/files#diff-b67911656ef5d18c4ae36cb6741b7965L41 . The changed line -SETTINGS_PATH=$(SETTINGS_TEST) FLASK_APP=$(APP) pytest -m unit shouldn't have a dash at the beginning as the original file. Dash is used to ignore exit status from the command, but we want to ignore this status only if the FEATURE is defined