Rename role, change parent to rm_dest (README updates)

Author: Bradley A. Thornton

README.md

@@ -21,21 +21,21 @@ pip install jsonref
 ```
 
 ```
-ansible-playbook -e parent=<parent> \
+ansible-playbook -e rm_dest=<destination for modules and module utils> \
                  -e structure=role \
                  -e model=<model> \
                  site.yml
 ```
 or
 ```
-ansible-playbook -e parent=<parent> \
+ansible-playbook -e rm_dest=<destination for modules and module utils> \
                  -e structure=collection \
                  -e collection_org=<collection_org> \
                  -e collection_name=<collection_name> \
                  -e model=<model> \
                  site.yml
 ```
-- `parent`: The parent directory in which the files and directories should be placed
+- `rm_dest`: The directory in which the files and directories for the resource module and facts modules should be placed
 - `structure`: The directory layout to be generated (role|collection)
   - `role`: Generate a role directory layout
   - `collection`: Generate a collection directory layout
@@ -55,7 +55,7 @@ See the `models` directory for an example.
 - `resource`: interfaces
 
 ```
-ansible-playbook -e parent=~/github/rm_example \
+ansible-playbook -e rm_dest=~/github/rm_example \
                  -e structure=collection \
                  -e collection_org=cidrblock \
                  -e collection_name=my_collection \
@@ -115,7 +115,7 @@ ansible-playbook -e parent=~/github/rm_example \
 - `resource`: interfaces
 
 ```
-ansible-playbook -e parent=~/github/rm_example/roles/my_role \
+ansible-playbook -e rm_dest=~/github/rm_example/roles/my_role \
                  -e structure=role \
                  -e model=models/myos/interfaces/myos_interfaces.yml \
                  site.yml
@@ -262,7 +262,7 @@ def main():
 The tests rely on a role generated by the resource module builder. After changes to the resource module builder, the role should be regenerated and the tests modified and run as needed.  To generate the role after changes:
 
 ```
-ansible-playbook -e parent=./rmb_tests/roles/my_role \
+ansible-playbook -e rm_dest=./rmb_tests/roles/my_role \
                  -e structure=role \
                  -e model=models/myos/interfaces/myos_interfaces.yml \
                  site.yml