Add python3-osprofiler as requirement for -tests subpackage

It's actually required to run unit tests.

Change-Id: I436ae0800962265e879b950a8eaf473183e1e562

python-magnumclient.spec

@@ -110,6 +110,9 @@ Requires:  python3-testtools
 Requires:  python3-keystoneauth1
 Requires:  python3-prettytable
 Requires:  python3-stestr
+%if 0%{?rhel}
+Requires:  python3-osprofiler
+%endif
 
 %description -n python3-%{pname}-tests
 %{common_desc_tests}