Revert "[mod] test_membership_cmd: always success status code"

This reverts commit ce759a4e.
Back to previous situation, since send_documentation()
is now exiting the error code to the shell

tests/test_membership.py

@@ -38,7 +38,7 @@ from patched.wot import (
 from silkaj import auth, membership, wot
 from silkaj.blockchain_tools import BlockchainParams, HeadBlock
 from silkaj.cli import cli
-from silkaj.constants import DATE, SUCCESS_EXIT_STATUS
+from silkaj.constants import DATE, FAILURE_EXIT_STATUS, SUCCESS_EXIT_STATUS
 from silkaj.network_tools import ClientInstance
 from silkaj.tui import display_pubkey_and_checksum
 
@@ -65,15 +65,15 @@ def patched_choose_identity(pubkey):
 
 
 @pytest.mark.parametrize(
-    "dry_run, display, confirmation",
+    "dry_run, display, confirmation, exit_code",
     [
-        (True, False, False),
-        (False, True, False),
-        (False, True, True),
-        (False, False, True),
+        (True, False, False, SUCCESS_EXIT_STATUS),
+        (False, True, False, SUCCESS_EXIT_STATUS),
+        (False, True, True, FAILURE_EXIT_STATUS),
+        (False, False, True, FAILURE_EXIT_STATUS),
     ],
 )
-def test_membership_cmd(dry_run, display, confirmation, monkeypatch):
+def test_membership_cmd(dry_run, display, confirmation, exit_code, monkeypatch):
     # Monkeypatch and Mock
     monkeypatch.setattr(auth, "auth_method", patched_auth_method)
     monkeypatch.setattr(HeadBlock, "get_head", patched_head_block)
@@ -125,7 +125,7 @@ def test_membership_cmd(dry_run, display, confirmation, monkeypatch):
     #       signing_key,
     #   )
 
-    assert result.exit_code == SUCCESS_EXIT_STATUS
+    assert result.exit_code == exit_code
 
 
 @pytest.mark.parametrize(