Description of problem:

As noted in https://bugzilla.redhat.com/show_bug.cgi?id=1093224#c5 , bkr machine-test (and other workflow commands) have a --machine and a --hostrequire switch. Now, if you specify both these, the job gets the following in <hostRequires> (for example):

<hostRequires>
<hostlabcontroller op="=" value="testlc.labcontroller"/>
<hostname op="=" value="test.system"/>
</hostRequires>

This doesn't make a lot of sense, and we should just use the hostname specified by --machine and ignore the --hostrequire.

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:

The job XML only has :

<hostRequires>
<hostname op="=" value="test.system"/>
</hostRequires>

Additional info: