Refactor to use 'omit' for DW config and setup

Signed-off-by: Webster Mudge <wmudge@cloudera.com>

Author: wmudge

roles/runtime/tasks/initialize_base.yml

@@ -190,12 +190,12 @@
           use_default_dbc: "{{ __dw_config.0.use_default_dbc }}"
           type: "{{ __dw_config.1.type | default(run__dw_default_vw_type) }}"
           template: "{{ __dw_config.1.template | default(run__dw_default_template_type) }}"
-          autoscaling_min_nodes: "{{ __dw_config.1.autoscaling.min_nodes | default(None) }}"
-          autoscaling_max_nodes: "{{ __dw_config.1.autoscaling.max_nodes | default(None) }}"
-          common_configs: "{{ __dw_config.1.configs.common_configs | default({}) }}"
-          application_configs: "{{ __dw_config.1.configs.application_configs | default({}) }}"
-          ldap_groups: "{{ __dw_config.1.configs.ldap_groups | default(None) }}"
-          enable_sso: "{{ __dw_config.1.configs.enable_sso | default(None) }}"
+          autoscaling_min_nodes: "{{ __dw_config.1.autoscaling.min_nodes | default(omit) }}"
+          autoscaling_max_nodes: "{{ __dw_config.1.autoscaling.max_nodes | default(omit) }}"
+          common_configs: "{{ __dw_config.1.configs.common_configs | default(omit) }}"
+          application_configs: "{{ __dw_config.1.configs.application_configs | default(omit) }}"
+          ldap_groups: "{{ __dw_config.1.configs.ldap_groups | default(omit) }}"
+          enable_sso: "{{ __dw_config.1.configs.enable_sso | default(omit) }}"
           tags: "{{ __dw_config.1.tags | default({}) | combine(run__dw_tags) }}"
       loop: "{{ run__dw_dbc_configs | subelements('virtual_warehouses')}}"
       loop_control: