Adding Cecilia's python examples

[alexorr]

Proposed Changes

Cecilia submitted this project of substitution examples. These types of things have been in the tools or utilities folders, but I'm proposing we create a folder just for examples along with a new category on the developer page.

Types of Changes

What types of changes does your code introduce? Put an x in the boxes that apply

• [x] New Project
• [] Enhancement
• [] Refactor
• [] Bug Fix

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask @cwhitty. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• [x] Project name conforms to the naming convention described here
• [x] Project name is unique within the repository
• [] Project exists in the appropriate directory based on its category and class, e.g. Libraries/DUTs/Community
• [x] Project can be imported into an iTest workspace without displaying problems or errors

• [x] Project contains a file called documentation/readme.txt with metadata necessary for the catalog. The readme.txt file must contain these 4 lines at the top of the file:
  Project: Name of project
  Description: 80 or so characters describing the contents of the project
  Category: ("library" | "automation" | "framework")
  Class: ("Community" | "Tested by Spirent" | "Reference").

  Other info like user instructions, a description of the intended use case, etc. can be added to the readme.txt after the 4 required lines.
  Note: A README.md file will be automatically generated including everything in the readme.txt file and a list of files, QuickCalls, and procedures with info from iTest's documentation fields. Do not create a README.md file, it will be overwritten. For the best possible documentation, fill out the description fields in each test case, procedure and QuickCall.

[cwhitty]

@alexorr i can't tell what changes you made to @cecilia27 original PR other than adding the readme.txt and moving it to another folder location. i have pushed my changes to her fork. you can see the commit history there. closing this PR in favor of the original one.