* Edit main.tf and variables.tf

* Edit variables references

* Edit the test/fixture/main.tf

* Rename variable

* Add net_profile_pod_cidr and net_profile_service_cidr vars

* Add net_profile_pod_cidr and net_profile_service_cidr vars

* Rename variable

* Edit the 'default_node_pool' config

* Update main.tf

reverse changes to break users

* Update main.tf

integrate the enhancement fields into module "aks"

* Update variables.tf

set some defaults to null when there is no definition from AzureRm Provider side

* Update README.md

* Update README.md

* Edit the README.md

* Update main.tf

format

* Update README.md

Kubernete version > 19.0 doesn't allow enable dashboard

* Update README.md

node name should be less than 12 characters
Co-authored-by: Yuping Wei <56525716+yupwei68@users.noreply.github.com>