BGPSpeaker: Move docstring from __init__ to class

By the default, Sphinx does not include __init__() method for the
"autoclass" directive, and currently the description for the arguments
of BGPSpeaker is not generated.

This patch moves the docstring of __init__() to the class's docstring
and enables to generate the docs for the arguments of __init__().

Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

ryu/services/protocols/bgp/bgpspeaker.py

@@ -221,23 +221,7 @@ class EventPrefix(object):
 
 
 class BGPSpeaker(object):
-    def __init__(self, as_number, router_id,
+    """Class to provide the APIs of Ryu BGP Speaker.
-                 bgp_server_hosts=DEFAULT_BGP_SERVER_HOSTS,
-                 bgp_server_port=DEFAULT_BGP_SERVER_PORT,
-                 refresh_stalepath_time=DEFAULT_REFRESH_STALEPATH_TIME,
-                 refresh_max_eor_time=DEFAULT_REFRESH_MAX_EOR_TIME,
-                 best_path_change_handler=None,
-                 adj_rib_in_change_handler=None,
-                 peer_down_handler=None,
-                 peer_up_handler=None,
-                 ssh_console=False,
-                 ssh_port=None, ssh_host=None, ssh_host_key=None,
-                 label_range=DEFAULT_LABEL_RANGE,
-                 allow_local_as_in_count=0,
-                 cluster_id=None,
-                 local_pref=DEFAULT_LOCAL_PREF):
-        """Create a new BGPSpeaker object with as_number and router_id to
-        listen on bgp_server_port.
 
     ``as_number`` specifies an Autonomous Number. It must be an integer
     between 1 and 65535.
@@ -306,6 +290,21 @@ class BGPSpeaker(object):
     integer.
     """
 
+    def __init__(self, as_number, router_id,
+                 bgp_server_hosts=DEFAULT_BGP_SERVER_HOSTS,
+                 bgp_server_port=DEFAULT_BGP_SERVER_PORT,
+                 refresh_stalepath_time=DEFAULT_REFRESH_STALEPATH_TIME,
+                 refresh_max_eor_time=DEFAULT_REFRESH_MAX_EOR_TIME,
+                 best_path_change_handler=None,
+                 adj_rib_in_change_handler=None,
+                 peer_down_handler=None,
+                 peer_up_handler=None,
+                 ssh_console=False,
+                 ssh_port=None, ssh_host=None, ssh_host_key=None,
+                 label_range=DEFAULT_LABEL_RANGE,
+                 allow_local_as_in_count=0,
+                 cluster_id=None,
+                 local_pref=DEFAULT_LOCAL_PREF):
         super(BGPSpeaker, self).__init__()
 
         settings = {