Enable ignore of static variables during rotate

[tpoland]

During a rotate operation, passwords that are statically set cannot be regenerated, only generated passwords can be regenerated. There doesn't appear to be a way to skip the statically set values during a rotate operation and this causes the rotate to exit.

Failure to rotate statically set secrets should be a warning not an error.

[tpoland]

A workaround for this issue is to set any static secrets to their current value and then use the --older-than filter to exclude them.

[thehandsomezebra]

:) Other workaround could also now be this:
#9