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Unable to establish connection to keystone endpoint.

I am trying to perform Openstack installation on Ubuntu Server 16.04
I am using following scenario.

Host Machine : Windows 7 ( IP : 192.168.1.15) installed VMWare application in it.

Guest Machine : Ubuntu Server 16.04 (IP : provided by VMWare DHCP 192.168.30.178)

Network Adapter : NAT ( VMNet8)

successfully installed openstack on it.

later when I want to access openstack dashboard from my host machine (http://192.168.30.178/dashboard) , I changed network adapter of my virtual machine to bridged , so it changes my virtual machine IP address to
( 192.168.1.52)
. so now , when i try to connect http://192.168.1.52/dashboard from my host machine, it open user authetication screen . I entered username as admin and password as mypassword(set by me in local.conf file) But it failed with error Unable to establish connection to keystone endpoint. I checked error log file /var/log/apache2/horizon_error.log , it gives following error

ERROR openstack_auth.plugin.base Unable to establish connection to http://192.168.30.178/identity/v3/auth/tokens : HttpConnectionPool( Host='192.168.30.178' ,port='80')

this means that horizon using my old IP address (192.168.30.178). So please help to change my old IP address with new IP address.How to update that.my new IP address is 192.168.1.52 . I changed my local.conf file with this new IP. please help me to solve this