Feature/DBOARD3-925 make report prettier

brian_polling_manager/error_report/cli.py

brian_polling_manager/error_report/config-example.json

brian_polling_manager/error_report/config.py

brian_polling_manager/error_report/email.jinja2

brian_polling_manager/error_report/error_report.html.jinja2

brian_polling_manager/error_report/report.py

test/error_report/data/test_render_html-expected.html

...eport/data/test_render_html_with_exclusions-expected.html

test/error_report/test_error_report.py