PKI usability enhancements

We've enhanced PKI commands to provide additional details about the local and certificate authority (CA) - issues certificates. With these enhancements, you can:

• View the CA certificate status of a CA profile group using the request security pki ca-profile-group-status ca-group-name group-name command.
  
• Configure certificate automatic reenrollment trigger time in days, hours, or percentage using the set security pki auto-re-enrollment cmpv2 certificate-id certificate-id-name re-enroll-time (days value | hours value | percentage value ) or set security pki auto-re-enrollment scep certificate-id certificate-idname re-enroll-time (days value | hours value | percentage value ) command.
• View the CA chain, SHA256 fingerprint, and certificate serial number (hexadecimal and decimal format) for a local certificate using the show security pki local certificate detail command
• View the CA profile associated with a CA certificate and SHA256 fingerprint using the show security pki ca-certificate <brief|detail> command.
• View additional verification information about local and CA certificate using the request security pki local-certificate verify and the request security pki ca-certificate verify command, respectively.
• View more PKI-related statistics using the show security pki statistics command. Clear the PKI statistics using the clear security pki statistics command.