Resolved flake8 issues #2351

Review ID: 391001
Merge pull request #15 from priyankarani/feature/task-2351

Resolved flake8 issues #2351
Bump version to 2.6.0.2

#2351
Merge branch 'release/2.6.0.2' into develop
Migration to 2.8 #2351

Review ID: 420001
Merge pull request #18 from priyankarani/feature/migration

Migration to 2.8 #2351
Bump to version 2.8.0.1
Merge branch 'release/2.8.0.1' into develop
Migration to 3.0 #3137
Merge pull request #19 from priyankarani/feature/migration

Migration to 3.0 #3137
Fixed render_template unicode
Merge pull request #20 from prakashpp/develop

Fixed render_template unicode
Release version 3.0.1.1
Merge branch 'release/3.0.1.1' into develop
Bump to 3.0.2.0dev
Separate Logic for default price list #2570

Logic separation for price list selection so that the
downstream modules can modify this functionality.

Review ID: 1683005
Deprecate argument due for deprecation

* Warning was raised since version 2.5
Refactor and clean cart
Send pricelist only if it exists
Merge pull request #22 from sharoonthomas/develop

Refactor and clean cart