Nexpose::ReportConfig.build incorrectly adds frequency when generate_now is true

[jhart-r7]

Assume you've built and scanned a site, but no reports are configured. This won't work:

Nexpose::ReportConfig.build(nsc, site.id, site.name, report_type, report_format, true)

When the last argument is true, the report is supposed to run immediately, however it doesn't because a Frequency is added which says generate only after the scan.

In short, with the gem you cannot report on a site immediately after creating the report config.

[mdaines-r7]

No longer adds the after-scan indicator if the generate_now flag is open.