PTI: Project-first wording

Projects aren't "Python projects" or "JavaScript projects" but
rather "projects with Python components" and "projects with
JavaScript components." A project might have deliverables with
repositories containing implementations of things in different
languages, or may even have multiple programming languages
represented within a single deliverable repository. Make it more
clear that language-specific PTI guidance is to be followed based on
the languages which are present, rather than implying that projects
are shoe-horned into one specific language.

Change-Id: I77b0b0c889d49f028dd595ed14d8095f450486d6

reference/pti/golang.rst

@@ -14,7 +14,7 @@ foreign to what developers are accustomed to in their respective
 communities.  Remember these are first OpenStack projects
 and they follow OpenStack processes where feasible.
 
-Each golang project must be able to do:
+Each project with golang components must be able to do:
 
 - Dependency installation
 - Code style checks

reference/pti/javascript.rst

@@ -5,7 +5,8 @@ Project Testing Interface: JavaScript
 =====================================
 
 This document outlines common ways to meet the Project Testing Interface
-requirements for JavaScript. Each JavaScript project must be able to do:
+requirements for JavaScript. Each project with JavaScript components must be
+able to do:
 
 - Codestyle checks.
 - Execute Tests and Code Coverage

reference/pti/python.rst

@@ -4,7 +4,7 @@
 Project Testing Interface: Python
 =================================
 
-Each python project must be able to do:
+Each project containing Python components must be able to do:
 
 - Unit tests for python (see below for version details)
 - Codestyle checks