Issue #433 Remove dummy data

[franfif]

What I did in branch 433-remove-dummy-data-Franfif:

• Remove Dummy Class Information:

  • Removed DummyHome class information present in the app/__init__.py file.

• Relocate Dummy Information to app/util/defaults:

  • Created util/defaults/default.py file.
  • Added default Home class and About class in default.py.

• Update Route Code for About and Home:

  • Modified the route code for the 'about' and 'home' pages to point to util/defaults/default.py Home and About classes when these don't exist in the database.

[NEW]

• Default image:
  • Added default image "/static/images/test.png" in util/defaults/default.py.
  • Modified all mentions in Pengin-Pi of "/static/images/test.png" to point to util/defaults/default.py/image instead
  • Easier to maintain, if the default image is changed in the future.

[franfif]

I also added the Exception type when the image was not fond in the route of home and about.

[stuart909]

wrong merge target. cancelling PR. I manually merged to dev-B1,2