schema_translate_map is running on aliases

Not sure how nobody noticed this, guess the feature hasn't seen any real use yet:

diff --git a/test/sql/test_compiler.py b/test/sql/test_compiler.py
index e7504a7..a3311f8 100644
--- a/test/sql/test_compiler.py
+++ b/test/sql/test_compiler.py
@@ -3406,6 +3406,26 @@ class SchemaTest(fixtures.TestBase, AssertsCompiledSQL):
             schema_translate_map=schema_translate_map
         )

+    def test_schema_translate_aliases(self):
+        schema_translate_map = {None: 'bar'}
+
+        alias = table1.alias()
+
+        stmt = select([
+            table2, alias
+        ]).select_from(table2.join(alias, table2.c.otherid == alias.c.myid)).\
+        where(alias.c.name == 'foo')
+
+        self.assert_compile(
+            stmt,
+            "SELECT bar.myothertable.otherid, bar.myothertable.othername, "
+            "mytable_1.myid, mytable_1.name, mytable_1.description "
+            "FROM bar.myothertable JOIN bar.mytable AS mytable_1 "
+            "ON bar.myothertable.otherid = mytable_1.myid "
+            "WHERE mytable_1.name = :name_1",
+            schema_translate_map=schema_translate_map
+        )
+
     def test_schema_translate_crud(self):
         schema_translate_map = {"remote_owner": "foob", None: 'bar'}

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