RecExCommon: Fix AMI tag parsing from metadata (temporary)

In some cases AMI tag from metadata can be a list. In those cases just take the last one.

This is mostly temporary until the underlying issue is fixed, but it would be good to have this in to be able to run Overlay tests with reco.

/cc @jchapman

Reconstruction/RecExample/RecExCommon/share/RecExCommon_topOptions.py

@@ -147,6 +147,9 @@ amitag = ""
 from PyUtils.MetaReaderPeeker import metadata
 try:
     amitag = metadata['AMITag']
+    # In some cases AMITag can be a list, just take the last one
+    if type(amitag) == list:
+        amitag=amitag[-1]
 except:
     logRecExCommon_topOptions.info("Cannot access TagInfo/AMITag")