test: re-enable act JUnit tests

Re-enable the JUnit tests which have been disabled in commit 0cfb762.
With the introduction of our own container layer in previous commits,
the entrypoint is now defined in the Dockerfile, rather than the
action.yaml file.

While the underlying issue still persists, we're no longer affected by
the discrepancy between act and the GitHub runner, each expecting
different types for the entrypoint element in the action's definition.

Associated issue: #26, #24

src/test/java/TasckatActionTestCase.java

@@ -11,7 +11,6 @@
 public class TasckatActionTestCase {
 
   @Test
-  @Ignore
   public void test_when_creds_are_missing_then_throw_NoCredentialsError()
     throws IOException, InterruptedException {
     ProcessBuilder pBuilder = new ProcessBuilder(
@@ -43,7 +42,6 @@ public void test_when_creds_are_missing_then_throw_NoCredentialsError()
   }
 
   @Test
-  @Ignore
   public void test_when_creds_are_available_then_create_cfn()
     throws IOException, InterruptedException {
 
@@ -83,7 +81,6 @@ public void test_when_creds_are_available_then_create_cfn()
   }
 
   @Test
-  @Ignore
   public void test_when_no_commands_then_print_help()
     throws IOException, InterruptedException {