Description of problem:

When you change value 'True' to 'False' in NeutronL3HA in overcloud.yaml, it ends up with becoming 'True' because tripleoclient overrides this value on its own decision.

If this behaviour is true without no exception, we should not allow users to change value of NeutronL3HA.
Using parameter_defaults sounds reasonable but it's more better for tripleocliet to not do anything by its own decision.


// * Setting
NeutronL3HA:
    default: 'False'
    description: Whether to enable l3-agent HA

// * Result
# Enable high availability for virtual routers.
# l3_ha = False
l3_ha = True


[1]https://github.com/openstack/tripleo-heat-templates/blob/2.1.0/puppet/compute.yaml#L201-L204
[2]https://github.com/openstack/python-tripleoclient/blob/06325dea70f43acc37b9a7d93380ef88f02efce7/tripleoclient/v1/overcloud_deploy.py#L178-L194

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info: