Update connection parameter resolution (#241)

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "edgedb/pgproto"]
 	path = edgedb/pgproto
 	url = https://github.com/MagicStack/py-pgproto.git
+[submodule "tests/shared-client-testcases"]
+	path = tests/shared-client-testcases
+	url = https://github.com/edgedb/shared-client-testcases.git

edgedb/asyncio_con.py

@@ -522,9 +522,9 @@ async def fetchone_json(self, query: str, *args, **kwargs) -> str:
 
 
 async def async_connect(dsn: str = None, *,
+                        credentils_file: str = None,
                         host: str = None, port: int = None,
                         user: str = None, password: str = None,
-                        admin: bool = None,
                         database: str = None,
                         tls_ca_file: str = None,
                         tls_verify_hostname: bool = None,
@@ -537,9 +537,9 @@ async def async_connect(dsn: str = None, *,
     if connection_class is None:
         connection_class = AsyncIOConnection
 
-    addrs, params, config = con_utils.parse_connect_arguments(
-        dsn=dsn, host=host, port=port, user=user, password=password,
-        database=database, admin=admin, timeout=timeout,
+    connect_config, client_config = con_utils.parse_connect_arguments(
+        dsn=dsn, credentials_file=credentils_file, host=host, port=port,
+        user=user, password=password, database=database, timeout=timeout,
         tls_ca_file=tls_ca_file, tls_verify_hostname=tls_verify_hostname,
         wait_until_available=wait_until_available,
 
@@ -548,7 +548,7 @@ async def async_connect(dsn: str = None, *,
         server_settings=None)
 
     connection = connection_class(
-        loop, addrs, config, params,
+        loop, [connect_config.address], client_config, connect_config,
         codecs_registry=_CodecsRegistry(),
         query_cache=_QueryCodecsCache(),
     )

edgedb/blocking_con.py

@@ -425,18 +425,18 @@ def is_closed(self) -> bool:
 
 
 def connect(dsn: str = None, *,
+            credentials_file: str = None,
             host: str = None, port: int = None,
             user: str = None, password: str = None,
-            admin: bool = None,
             database: str = None,
             tls_ca_file: str = None,
             tls_verify_hostname: bool = None,
             timeout: int = 10,
             wait_until_available: int = 30) -> BlockingIOConnection:
 
-    addrs, params, config = con_utils.parse_connect_arguments(
-        dsn=dsn, host=host, port=port, user=user, password=password,
-        database=database, admin=admin,
+    connect_config, client_config = con_utils.parse_connect_arguments(
+        dsn=dsn, credentials_file=credentials_file, host=host, port=port,
+        user=user, password=password, database=database,
         timeout=timeout,
         wait_until_available=wait_until_available,
         tls_ca_file=tls_ca_file, tls_verify_hostname=tls_verify_hostname,
@@ -446,7 +446,8 @@ def connect(dsn: str = None, *,
         server_settings=None)
 
     conn = BlockingIOConnection(
-        addrs=addrs, params=params, config=config,
+        addrs=[connect_config.address], params=connect_config,
+        config=client_config,
         codecs_registry=_CodecsRegistry(),
         query_cache=_QueryCodecsCache())
     conn.ensure_connected()