Fix neutron_keepalived_no_track default logic

Current logic didn't make sense and made condition to be always true
for ubuntu/debian regardless OS version. While for bionic it should have
remained as false.

Change-Id: I5a2cfa40dbcd8116065892e5994898914fd0480b
(cherry picked from commit f441b21)

vars/debian.yml

@@ -108,4 +108,4 @@ neutron_oslomsg_amqp1_distro_packages:
   - libsasl2-modules
   - sasl2-bin
 
-_neutron_keepalived_no_track: "{{ (ansible_distribution_major_version is version('20', '>=') or ansible_os_family | lower == 'debian') }}"
+_neutron_keepalived_no_track: "{{ (ansible_distribution_major_version is version('20', '>=') or ansible_distribution | lower == 'debian') }}"