Distinguish project name and repo name

Currently, initials of project names are written with a lower case.
This patch set distinguishes project name of which initials are written with
a capital case, and repo name of which initials are written with a lower case.

e.g.) Nova
project name: Nova
repo name: nova

Change-Id: I3899c06e970946d219c81638e089148ae0d7eb3b

README.rst

@@ -17,4 +17,4 @@ To use, `cd` into the project directory then run::
 
     cookiecutter https://git.openstack.org/openstack/tempest-plugin-cookiecutter.git
 
-You will be prompted for the name/class of the tempest plugin to create.
+You will be prompted for the project name/repository name/class of the tempest plugin to create.

cookiecutter.json

@@ -1,4 +1,5 @@
 {
-    "project": "sample",
+    "project": "Sample",
+    "repo_name": "sample",
     "testclass": "SampleTempestPlugin"
 }

{{cookiecutter.repo_name}}/{{cookiecutter.repo_name}}_tempest_plugin/plugin.py

@@ -19,14 +19,14 @@ import os
 from tempest import config
 from tempest.test_discover import plugins
 
-from {{cookiecutter.project}}_tempest_plugin import config as project_config
+from {{cookiecutter.repo_name}}_tempest_plugin import config as project_config
 
 
 class {{cookiecutter.testclass}}(plugins.TempestPlugin):
     def load_tests(self):
         base_path = os.path.split(os.path.dirname(
             os.path.abspath(__file__)))[0]
-        test_dir = "{{cookiecutter.project}}_tempest_plugin/tests"
+        test_dir = "{{cookiecutter.repo_name}}_tempest_plugin/tests"
         full_test_dir = os.path.join(base_path, test_dir)
         return full_test_dir, base_path