Break when pg_probackup version is incorrect

Author: egarbuz

testgres/plugins/pg_probackup2/pg_probackup2/init_helpers.py

@@ -204,9 +204,11 @@ def __init__(self):
         os.environ["PGAPPNAME"] = "pg_probackup"
         self.delete_logs = delete_logs
 
-        self.major_version = 0
         if self.probackup_version.split('.')[0].isdigit:
             self.major_version = int(self.probackup_version.split('.')[0])
+        else:
+            print('Pg_probackup version is not correct!')
+            sys.exit(1)
 
     def test_env(self):
         return self._test_env.copy()