Added change to not return error for Sonic t2/spine-router role

when config bgp shut/startup command given for BGP Neighbor if the given
neighbor are not present. This is done because for T2 BGP neighbors are
present across different LC's so it's possible when command is executed
that neighbor might not be present on that LC

Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>

config/main.py

@@ -3619,8 +3619,12 @@ def neighbor(ipaddr_or_hostname, verbose):
         if _change_bgp_session_status(config_db, ipaddr_or_hostname, 'down', verbose):
             found_neighbor = True
 
+    device_metadata = config_db.get_entry('DEVICE_METADATA', 'localhost')
     if not found_neighbor:
-        click.get_current_context().fail("Could not locate neighbor '{}'".format(ipaddr_or_hostname))
+        if device_metadata['type'] == 'SpineRouter':
+            click.echo("Could not locate neighbor '{}'".format(ipaddr_or_hostname))
+        else:
+            click.get_current_context().fail("Could not locate neighbor '{}'".format(ipaddr_or_hostname))
 
 @bgp.group(cls=clicommon.AbbreviationGroup)
 def startup():
@@ -3674,8 +3678,12 @@ def neighbor(ipaddr_or_hostname, verbose):
         if _change_bgp_session_status(config_db, ipaddr_or_hostname, 'up', verbose):
             found_neighbor = True
 
+    device_metadata = config_db.get_entry('DEVICE_METADATA', 'localhost')
     if not found_neighbor:
-        click.get_current_context().fail("Could not locate neighbor '{}'".format(ipaddr_or_hostname))
+        if device_metadata['type'] == 'SpineRouter':
+            click.echo("Could not locate neighbor '{}'".format(ipaddr_or_hostname))
+        else:
+            click.get_current_context().fail("Could not locate neighbor '{}'".format(ipaddr_or_hostname))
 
 #
 # 'remove' subgroup ('config bgp remove ...')