invalid report names

[steveoh]

sweeper report naming needs to be improved to allow for feature service input.

@gregbunce I think it's because the table name is built into the filename of the report, which causes problems when the table name is a URL:

OSError: [Errno 22] Invalid argument: 'c:\\\\Temp\\sweeper_run_20201130_0842\\https://services.arcgis.com/ZzrwjTRez6FJiOq4/arcgis/rest/services/Oil_and_Gas_Fields/FeatureServer/0_DuplicateTest_0.txt'

Originally posted by @eneemann in agrc/porter#85 (comment)