packaging: Fix fedora downstream tests (#416)

Probably a design flaw upstream, but this should be a quick fix in the
meantime

teemtee/tmt#2184

---------

Signed-off-by: Cristian Le <[email protected]>

Author: LecrisUT

docs/examples/test.sh

@@ -6,8 +6,8 @@ source /usr/share/beakerlib/beakerlib.sh || exit 1
 rlJournalStart
     rlPhaseStartSetup
         rlRun "tmp=\$(mktemp -d)" 0 "Create tmp directory"
-		    rlRun "rsync -r $TMT_TREE$TMT_TEST_NAME/ $tmp" 0 "Copy example project"
-		    rlRun "rsync -r $TMT_TREE$TMT_TEST_NAME/../test.py $tmp" 0 "Copy test.py file"
+		    rlRun "rsync -r ${TMT_SOURCE_DIR:-$TMT_TREE}$TMT_TEST_NAME/ $tmp" 0 "Copy example project"
+		    rlRun "rsync -r ${TMT_SOURCE_DIR:-$TMT_TREE}$TMT_TEST_NAME/../test.py $tmp" 0 "Copy test.py file"
         rlRun "pushd $tmp"
         rlRun "tree" 0 "Show directory tree"
         rlRun "set -o pipefail"