Disable Redis for Staging added statsd for post methods

- Disable Redis as there is a current connection limit of 256 which
 could slow down the request if they are all used
 - Added statd to methods in the post to help spot any bottlenecks

app/notifications/validators.py

@@ -14,6 +14,7 @@ from app.models import (
     KEY_TYPE_TEST, KEY_TYPE_TEAM, SCHEDULE_NOTIFICATIONS
 )
 from app.service.utils import service_allowed_to_send_to
+from app.statsd_decorators import statsd
 from app.v2.errors import TooManyRequestsError, BadRequestError, RateLimitError
 from app import redis_store
 from app.notifications.process_notifications import create_content_for_notification
@@ -46,6 +47,7 @@ def check_service_over_daily_message_limit(key_type, service):
             raise TooManyRequestsError(service.message_limit)
 
 
+@statsd(namespace="performance-testing")
 def check_rate_limiting(service, api_key):
     check_service_over_api_rate_limit(service, api_key)
     check_service_over_daily_message_limit(api_key.key_type, service)
@@ -80,12 +82,14 @@ def service_has_permission(notify_type, permissions):
     return notify_type in [p.permission for p in permissions]
 
 
+@statsd(namespace="performance-testing")
 def check_service_has_permission(notify_type, permissions):
     if not service_has_permission(notify_type, permissions):
         raise BadRequestError(message="Cannot send {}".format(
             get_public_notify_type_text(notify_type, plural=True)))
 
 
+@statsd(namespace="performance-testing")
 def check_service_can_schedule_notification(permissions, scheduled_for):
     if scheduled_for:
         if not service_has_permission(SCHEDULE_NOTIFICATIONS, permissions):
@@ -117,6 +121,7 @@ def check_sms_content_char_count(content_count):
         raise BadRequestError(message=message)
 
 
+@statsd(namespace="performance-testing")
 def validate_template(template_id, personalisation, service, notification_type):
     try:
         template = templates_dao.dao_get_template_by_id_and_service_id(