[RAB-2] adding code to retrieve legacy quotes

adding migration script for legacy quotes
changing docker-compose file to use different container names

tools/quotes-migration/main.py

@@ -0,0 +1,22 @@
+from legacy_loader import create_connection, load_all_quotes_with_attachments
+from quote_importer import insert_quotes, create_users, create_channels
+import sqlalchemy as db
+import os
+
+server_id = os.getenv('SERVER_ID')
+conn = create_connection('new_quotes.db')
+
+all_quotes = load_all_quotes_with_attachments(conn)
+db_host = os.getenv('DB_HOST')
+db_port = os.getenv('DB_PORT')
+db_database = os.getenv('DB_NAME')
+db_user = os.getenv('DB_USER')
+db_password = os.getenv('DB_PASS')
+engine = db.create_engine('postgresql://%s:%s@%s:%s/%s' % (db_user, db_password, db_host, db_port, db_database))
+
+with engine.connect() as con:
+    with con.begin():
+        create_users(server_id, all_quotes, con)
+        create_channels(server_id, all_quotes, con)
+    with con.begin():
+        insert_quotes(server_id, all_quotes, con)