Modified 2 files to update newsrec model

[sumana-2705]

Description

I have modified the file, base_model.py in which I added a parameter named step_limit(which is optional) into the funtion fit and also modified the file test_newsrec_model.py, I have adjusted step_limit=1 which speeds up the smoke test.

Related Issues

It fixes the issue #2044

References

I have done changes as mentioned in the issue

Checklist:

• [x] I have followed the contribution guidelines and code style for this project.
• [x] I have signed the commits, e.g. git commit -s -m "your commit message".
• [x] This PR is being made to staging branch AND NOT TO main branch.