Do not redefine variables with their default values in tempest.conf

We should keep tempest.conf as simple as it is possible.
These variables do not need to be defined as we point to tempest's default values anyway.

https: //docs.openstack.org/tempest/latest/_static/tempest.conf.sample
Change-Id: Id83775ff91e53dac134eecc789002431659e7d66

templates/tempest.conf.j2

@@ -9,7 +9,6 @@ log_file = {{ tempest_log_dir}}/tempest.log
 
 [auth]
 use_dynamic_credentials = True
-default_credentials_domain_name = Default
 admin_domain_name = Default
 admin_username = {{ keystone_admin_user_name }}
 admin_project_name = {{ keystone_admin_tenant_name }}
@@ -58,11 +57,9 @@ endpoint_type = internalURL
 disable_ssl_certificate_validation = {{ tempest_keystone_interface_insecure | bool }}
 uri = {{ keystone_service_internaluri }}/v2.0
 uri_v3 = {{ keystone_service_internalurl }}
-auth_version = v3
 v2_admin_endpoint_type = adminURL
 v2_public_endpoint_type = internalURL
 v3_endpoint_type = adminURL
-admin_role = admin
 
 
 [identity-feature-enabled]
@@ -91,7 +88,6 @@ api_v2 = {{ tempest_image_api_v2_enabled }}
 
 [network]
 endpoint_type = internalURL
-project_networks_reachable = false
 public_network_id = {{ tempest_neutron_public_network_id }}
 floating_network_name = {{ tempest_public_net_name }}
 build_timeout = 600
@@ -106,7 +102,6 @@ api_extensions = agent,allowed-address-pairs,binding,dhcp_agent_scheduler,ext-gw
 [object-storage]
 endpoint_type = internalURL
 operator_role = swiftoperator
-reseller_admin_role = ResellerAdmin
 
 
 [object-storage-feature-enabled]
@@ -165,9 +160,7 @@ endpoint_type = internalURL
 
 [validation]
 run_validation = {{ tempest_compute_run_ssh }}
-auth_method = keypair
 image_ssh_user = {{ tempest_compute_image_ssh_user }}
-floating_ip_range = 10.0.0.0/29
 ping_timeout = 240
 connect_timeout = 120
 ssh_timeout = 600