Fix fortinet get sys status capture group names

[mjbear]

closes #1774 breaking change

Carrying @glennake's PR across the finish line with some test data (albeit not from the old 6.4 release and instead 7.0). (Huge thanks to @pnpestov for test data.)

• separate some multi-word capture groups with an underscore (SECURITYLEVEL to SECURITY_LEVEL)
• make other capture groups more descriptive (SIGNATURE to FIRMWARE_SIGNATURE)
• create new capture groups for others so they're captured and APP_DB isn't overwritten
• add missing test data to "complete" #1774

Note: There were two commits in Glenn's PR - a system status and an ospf one. Because of this I :cherries: cherry picked Glenn's get system status commit and ironed things out from there.

[mjbear]

@pnpestov @pskliarenko @refriedjello @glennake I see you all have worked on Fortinet templates...

Care to give these get system status template changes a real world test to make sure things are solid? Thank you!

[pnpestov]

@mjbear

Care to give these get system status template changes a real world test to make sure things are solid?

Good day! Yes, it really works with software version 7.0.15