secondaries failing to start with signing_privatekey does not in keystore error

[murali-shris]

Exception: @ doom22male:signing_privatekey@ doom22male does not exist in keystore for 4120 Exception: @ 16shinygreenblue:signing_privatekey@ 16shinygreenblue does not exist in keystore for 4197 Exception: @ silentjay:signing_privatekey@ silentjay does not exist in keystore for 1665 Exception: @ 26juststay:signing_privatekey@ 26juststay does not exist in keystore for 2453 Exception: @ newyorkdollhostile:signing_privatekey@ newyorkdollhostile does not exist in keystore for 3940 Exception: @ viruddh73rolling:signing_privatekey@ viruddh73rolling does not exist in keystore for 3944 Exception: @ fortunatemallard:signing_privatekey@ fortunatemallard does not exist in keystore for 1644 Exception: @ 50availablekendo:signing_privatekey@ 50availablekendo does not exist in keystore for 4192

[cpswan]

I've turned doom22male into a canary so that it has the fix from #457 but it doesn't result in a secondary that will pass seccheck as the scan returns an empty array:

@scan
data:[]

We still need to figure out how the keys are being deleted, and what can be done to prevent that.

[murali-shris]

Workaround fix done. https://github.com/atsign-foundation/at_server/pull/457 Some of these secondaries were reset. But cannot confirm whether there is a bug on server related to key deletion.Needs further investigation

[murali-shris]

moving this is to backlog..since we don't have a mechanism to check the logs for shutdown secondaries