Move mixture nominal to grid

bb2etp.py

@@ -208,7 +208,7 @@ class BeambackgroundMetadata:
         '''
         assert self.on_etp, "Executions does not seem to be on ETP. Ceph paths are not accessible."
         assert self.ceph_path is not None, "ceph_paths is None. Please set the paths."
-        assert (os.path.exists(self.ceph_path) and os.path.isdir(self.ceph_path)), f"The path '{self.ceph_path}' does not exist or is not a directory."
+        #assert (os.path.exists(self.ceph_path) and os.path.isdir(self.ceph_path)), f"The path '{self.ceph_path}' does not exist or is not a directory."
         assert self.has_certificate, "No certificate found. Please set X509_USER_PROXY."
         from XRootD import client
         client = client.FileSystem(self.gridka_server)