Add test for adding node to cluster

Signed-off-by: a.y.volkov <a.y.volkov@yadro.com>

robot/resources/lib/python_keywords/epoch.py

@@ -1,5 +1,7 @@
 #!/usr/bin/python3.9
+import sys
 
+import allure
 from robot.api import logger
 from robot.api.deco import keyword
 
@@ -28,18 +30,27 @@ def tick_epoch():
         # If neofs-adm is available, then we tick epoch with it (to be consistent with UAT tests)
         cmd = f"{NEOFS_ADM_EXEC} morph force-new-epoch -c {NEOFS_ADM_CONFIG_PATH}"
         logger.info(f"Executing shell command: {cmd}")
+        out = ''
+        err = ''
         try:
             out = wrappers.run_sh(cmd)
             logger.info(f"Command completed with output: {out}")
         except Exception as exc:
             logger.error(exc)
+            err = str(exc)
             raise RuntimeError("Failed to tick epoch") from exc
-
+        finally:
+            if 'allure' in sys.modules:
+                allure.attach((
+                    f'COMMAND: {cmd}\n'
+                    f'OUTPUT:\n {out}\n'
+                    f'ERROR: {err}\n'
+                ), 'Tick Epoch', allure.attachment_type.TEXT)
         return
 
     # Otherwise we tick epoch using transaction
     cur_epoch = get_epoch()
     return contract.invoke_contract_multisig(
         contract.get_netmap_contract_hash(MORPH_ENDPOINT),
-        f"newEpoch int:{cur_epoch+1}",
+        f"newEpoch int:{cur_epoch + 1}",
         IR_WALLET_PATH, IR_WALLET_PASS, MORPH_ENDPOINT)