Clean memory in test_process.cpp (backport ros2#495) (ros2#496)

* Clean memory in test_process.cpp (ros2#495)

Signed-off-by: Alejandro Hernandez Cordero <[email protected]>
(cherry picked from commit 072ba18)

Author: mergify[bot]

test/test_join.cpp

@@ -89,4 +89,12 @@ TEST(test_join, join) {
   EXPECT_EQ(
     RCUTILS_RET_OK,
     rcutils_string_array_fini(&tokens0));
+
+  EXPECT_EQ(
+    RCUTILS_RET_OK,
+    rcutils_string_array_fini(&tokens1));
+
+  EXPECT_EQ(
+    RCUTILS_RET_OK,
+    rcutils_string_array_fini(&tokens2));
 }

test/test_process.cpp

@@ -83,6 +83,8 @@ TEST(TestProcess, test_process_creation) {
 
   rcutils_process_close(process);
 
+  ret = rcutils_string_array_fini(&args);
+
   // cmake -E cat "file with space.txt" (returns 0)
   ret = rcutils_string_array_resize(&args, 4);
   ASSERT_EQ(RCUTILS_RET_OK, ret);
@@ -100,6 +102,8 @@ TEST(TestProcess, test_process_creation) {
 
   rcutils_process_close(process);
 
+  ret = rcutils_string_array_fini(&args);
+
   // cmake -E false (returns 1)
   ret = rcutils_string_array_resize(&args, 3);
   ASSERT_EQ(RCUTILS_RET_OK, ret);