Missing api_base_url parameter in retry_failed.py

[utdrmac]

Closes #253

This PR resolves the issue #253 . The following steps were performed:

• Analysis: CLI parameters that were added in TzKT reward & block provider #232 were missing from retry_failed.py
• Solution: Added missing parameters
• Implementation: ^^
• Performed tests: Tested/confirmed by end-user songproducer in issue
• Documentation: NA
• Check list:

[NA] I extended the Travis CI test units with the corresponding tests for this new feature (if needed).
[NA] I extended the Sphinx documentation (if needed).
[NA] I extended the help section (if needed).
[NA] I changed the README file (if needed).
[NA] I created a new issue if there is further work left to be done (if needed).

Work effort: 2hrs

[utdrmac]

ugh. crap. i committed something for another issue.

[jdsika]

Time effort is missing + the usage of the PR template. Could you edit it please?
We need @amzid for a review before we merge.

[amzid]

We might need to think about a better way in the future to avoid adapting retry_failed.py each time we make a change to main.py by trying somehow to merge both files or putting the common relevant parts in callable functions.

[utdrmac]

Agreed. I think we should be able to remove retry_failed.py completely and integrate another -M mode for this purpose. It's 99% the same code as main.py + everything else.

[jdsika]

Please do not forget to document the work effort + contributor github name in the squash commit into master