Capture previous command exit code in integration tests cleanup (#2503)

* show previous response code

* log previous response code of shell script command

test/tests/test_specs/test_spec.sh

@@ -15,6 +15,7 @@ env=python-$TEST_ID
 fn=spec-$TEST_ID
 
 cleanup() {
+    echo "previous response" $?
     log "Cleaning up..."
     clean_resource_by_id $TEST_ID
     rm -rf $tmp_dir

test/tests/test_specs/test_spec_archive/test_spec_archive.sh

@@ -5,6 +5,7 @@ source $(dirname $0)/../../../utils.sh
 ROOT=` realpath $(dirname $0)/../../../../`
 
 cleanup() {
+    echo "previous response" $?
     log "Cleaning up..."
     fission spec destroy
     rm -rf func

test/tests/test_specs/test_spec_merge/test_spec_merge.sh

@@ -9,6 +9,7 @@ env_n=nodend
 fn_nd=nodehellond
 
 cleanup() {
+    echo "previous response" $?
     log "Cleaning up..."
     fission spec destroy || true
     popd

test/tests/test_specs/test_spec_multifile.sh

@@ -15,6 +15,7 @@ env=python-$TEST_ID
 fn=spec-$TEST_ID
 
 cleanup() {
+    echo "previous response" $?
     log "Cleaning up..."
     clean_resource_by_id $TEST_ID
     rm -rf $tmp_dir