xhtml2pdf report template

[rutujaac]

Non Pango Report PDF Template using xhtml2pdf:

1. Introduces new function to generate PDF report from HTML Template using xhtml2pdf python library

Pass the value to renderer in Reports.generate_report function in reports.py
Default value for renderer is weasyprint

Reports.generate_report(data, outputPath='./report.pdf', format = 'pdf', renderer='xhtml2pdf')

Scenarios tested:

1. Print report using default weasyprint renderer:
   Output:

2. Print report using xhtml2pdf renderer:
   Output:

3. Unsupported output file format:
   Ouput:

4. Unsupported renderer:
   Output:

[shreyas-damle]

• Please add output in the description of the PR with below
  • Supported format and renderer
  • Supported format and unsupported renderer
  • Unsupported format and supported renderer
• I would suggest to add unit tests with this, so that we make sure that existing functionality is not breaking.
• Load history changes are included in this, please remove those.

[shreyas-damle]

Changes look good to me. Please consider taking unit tests in next PR.