Add flaky as a dependency to Software tests page

[PritishSehzpaul]

Issue description

I was following the installation guide for pennylane from https://pennylane.readthedocs.io/en/stable/development/guide/installation.html. I installed all the dependencies as mentioned on this page and moved on to the next page which talks about running the test suite to check the installation. I encountered an issue with it as attached below.

In the list of dependencies in the file https://github.com/PennyLaneAI/pennylane/blob/master/doc/development/guide/tests.rst, flaky should be added as a dependency. This is because when you run make test and flaky is not installed, an error is thrown as attached below.

As I understand, the flag --no-flaky-report is provided by flaky.

• Expected behavior: When make test is run the tests should be run without any error.

• Actual behavior: I get the above error.

• Reproduces how often: Everytime if flaky as a dependency is not installed.

• System information:

  • Windows x64 bit.
  • Using Anaconda3 and pennylane has a separate environment. in conda
  • Installed dependency versions

    Dependency	Version
    python	3.7.9
    numpy	1.19.2
    scipy	1.6.0
    networkx	2.5
    autograd	1.3
    toml	0.10.1
    appdirs	1.4.4
    semantic_version	2.6.0

  • Output of import pennylane as qml; qml.about() -

WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip.
Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue.
To avoid this problem you can invoke Python with '-m pip' instead of running pip directly.
Name: PennyLane
Version: 0.15.0.dev0
Summary: PennyLane is a Python quantum machine learning library by Xanadu Inc.
Home-page: https://github.com/XanaduAI/pennylane
Author: None
Author-email: None
License: Apache License 2.0
Location: e:\code\pennylane
Requires: numpy, scipy, networkx, autograd, toml, appdirs, semantic-version
Required-by:
Platform info:           Windows-10-10.0.19041-SP0
Python version:          3.7.9
Numpy version:           1.19.2
Scipy version:           1.6.0
Installed devices:
- default.gaussian (PennyLane-0.15.0.dev0)
- default.mixed (PennyLane-0.15.0.dev0)
- default.qubit (PennyLane-0.15.0.dev0)
- default.qubit.autograd (PennyLane-0.15.0.dev0)
- default.qubit.jax (PennyLane-0.15.0.dev0)
- default.qubit.tf (PennyLane-0.15.0.dev0)
- default.tensor (PennyLane-0.15.0.dev0)
- default.tensor.tf (PennyLane-0.15.0.dev0)

[josh146]

Hi @PritishSehzpaul! Good catch, this should definitely be added.

[josh146]

Would you be interested in making a contribution to update the file https://github.com/PennyLaneAI/pennylane/blob/master/doc/development/guide/tests.rst?

[PritishSehzpaul]

Would you be interested in making a contribution to update the file https://github.com/PennyLaneAI/pennylane/blob/master/doc/development/guide/tests.rst?

Hi @josh146, sure. I will raise a PR shortly after going through the contributing guidelines.

[josh146]

Thanks @PritishSehzpaul! Feel free to open a WIP (work in progress) PR if you have any questions.