[BUG] [TST] Multitenancy bug fix (#1276)

## Description of changes

*Summarize the changes made by this PR.*
 - Improvements & Bug fixes
- Fixes a small bug that was introduced by a bad merge in #1244 .
Get_coll should look at the metadata in the model, not from the input
collection.
 - New functionality
	 - None.

## Test plan
*How are these changes tested?*
These are test changes.
- [x] Tests pass locally with `pytest` for python, `yarn test` for js

## Documentation Changes
None required.

chromadb/test/property/test_collections.py

@@ -65,7 +65,7 @@ def get_coll(self, coll: strategies.Collection) -> None:
         if coll.name in self.model:
             c = self.api.get_collection(name=coll.name)
             assert c.name == coll.name
-            assert c.metadata == coll.metadata
+            assert c.metadata == self.model[coll.name]
         else:
             with pytest.raises(Exception):
                 self.api.get_collection(name=coll.name)