Add /usr/local/bin to PATH for tests

pip3 will install commands there and later scripts will not be able
to find them.

Related rhbz#1653934

tests/test_cli.sh

@@ -29,6 +29,7 @@ done;
 
 
 export BEAKERLIB_JOURNAL=0
+export PATH="/usr/local/bin:$PATH"
 if [ -z "$*" ]; then
     # invoke cli/ tests which can be executed without special preparation
     ./tests/cli/test_blueprints_sanity.sh