Fix maintain CLI caching class attributes (#12918)

(cherry picked from commit ea7b5c9)

robottelo/cli/sm_packages.py

@@ -30,20 +30,23 @@ class Packages(Base):
     def lock(cls, options=None):
         """Build satellite-maintain packages lock"""
         cls.command_sub = 'lock'
+        cls.command_end = None
         options = options or {}
         return cls.sm_execute(cls._construct_command(options))
 
     @classmethod
     def unlock(cls, options=None):
         """Build satellite-maintain packages unlock"""
         cls.command_sub = 'unlock'
+        cls.command_end = None
         options = options or {}
         return cls.sm_execute(cls._construct_command(options))
 
     @classmethod
     def is_locked(cls, options=None):
         """Build satellite-maintain packages is-locked"""
         cls.command_sub = 'is-locked'
+        cls.command_end = None
         options = options or {}
         return cls.sm_execute(cls._construct_command(options))
 
@@ -75,5 +78,6 @@ def update(cls, packages='', options=None):
     def check_update(cls, options=None):
         """Build satellite-maintain packages check-update"""
         cls.command_sub = 'check-update'
+        cls.command_end = None
         options = options or {}
         return cls.sm_execute(cls._construct_command(options))