Adjustments to make the package build for epel8

Vagrant should not be necessary to run unit tests. Also updated
exit code check in test_step_execute because it (interestingly)
returns '-1' on rhel8.

tests/unit/test_cli.py

@@ -100,7 +100,7 @@ def test_step_execute():
         tmt.cli.main, ['--root', example('local'), 'run', step])
 
     # Test execute empty with discover output missing
-    assert result.exit_code == 1
+    assert result.exit_code != 0
     assert 'Could not find TESTS file' in result.output
 
     assert step in result.output

tmt.spec

@@ -38,7 +38,6 @@ This package contains the command line tool.
 
 %package -n     python%{python3_pkgversion}-%{name}
 Summary:        %{summary}
-BuildRequires: vagrant
 BuildRequires: python%{python3_pkgversion}-devel
 BuildRequires: python%{python3_pkgversion}-setuptools
 BuildRequires: python%{python3_pkgversion}-pytest