Use a separated option '--env-name' to render a new environment

Change-Id: I3bfa9dc52f141d0d5ab5d372eea63799eacb12ab
diff --git "a/examples/environment/\173\173 cookiecutter.cluster_name \175\175/common.yml" "b/examples/environment/\173\173 _environment_name \175\175/common.yml"
similarity index 100%
rename from "examples/environment/\173\173 cookiecutter.cluster_name \175\175/common.yml"
rename to "examples/environment/\173\173 _environment_name \175\175/common.yml"
diff --git "a/examples/environment/\173\173 cookiecutter.cluster_name \175\175/init.yml" "b/examples/environment/\173\173 _environment_name \175\175/init.yml"
similarity index 93%
rename from "examples/environment/\173\173 cookiecutter.cluster_name \175\175/init.yml"
rename to "examples/environment/\173\173 _environment_name \175\175/init.yml"
index 6153a6b..ca63bc4 100644
--- "a/examples/environment/\173\173 cookiecutter.cluster_name \175\175/init.yml"
+++ "b/examples/environment/\173\173 _environment_name \175\175/init.yml"
@@ -19,5 +19,5 @@
               {{ toyaml( node['parameters']['linux']['network']['interface'], width=14 ) }}
 {%- endif %}
           classes:
-          - environment.{{ cookiecutter.cluster_name }}.common
+          - environment.{{ _environment_name }}.common
 {%- endfor %}