Remove hard-coded bgp speaker asn number, fetch from DUT

ansible/roles/test/tasks/bgp_speaker.yml

@@ -8,8 +8,6 @@
 - fail: msg="Invalid testbed_type value '{{testbed_type}}'"
   when: testbed_type not in ['t0', 't0-64']
 
-- include_vars: "vars/deployment_id_asn_map.yml"
-
 - name: Gather minigraph facts about the device
   minigraph_facts: host={{inventory_hostname}}
   become: no
@@ -18,9 +16,13 @@
 - name: print deployment id
   debug: msg="{{deployment_id}}"
 
+- name: fetch bgp speaker asn number from DUT
+  shell: sonic-cfggen -m -d -y /etc/sonic/deployment_id_asn_map.yml -v "deployment_id_asn_map[DEVICE_METADATA['localhost']['deployment_id']]"
+  register: cfggen_out
+
 - name: set bgp speaker asn number
   set_fact:
-     bgp_speaker_asn={{deployment_id_asn_map[deployment_id]}}
+     bgp_speaker_asn={{cfggen_out.stdout}}
 
 - name: print bgp speaker asn number
   debug: msg="{{bgp_speaker_asn}}"
@@ -89,6 +91,11 @@
     - {file_name: 'start.sh', config_file_1: 'config_1.ini', config_file_2: 'config_2.ini', config_file_3: 'config_3.ini', phy_ip: '{{vlan_ips[0]}}', logical_ip_1: '{{speaker_ips[0]}}', logical_ip_2: '{{speaker_ips[1]}}'}
   delegate_to: "{{ptf_host}}"
 
+- name: Kill exabgp instances if existing
+  shell: pkill exabgp
+  delegate_to: "{{ptf_host}}"
+  ignore_errors: yes
+
 - name: Start exabgp instances
   shell: sh {{exabgp_dir}}/start.sh
   delegate_to: "{{ptf_host}}"