existing metadata or annotation on vanity url is removed

[mishraomp]

with our approach to delete and create vanity url with updated certs, it is removing the existing annotations on the route
for ex:

  annotations:
    haproxy.router.openshift.io/disable_cookies: 'true'
    haproxy.router.openshift.io/rate-limit-connections: 'true'
    haproxy.router.openshift.io/rate-limit-connections.concurrent-tcp: '100'
    haproxy.router.openshift.io/rate-limit-connections.rate-http: '200'
    haproxy.router.openshift.io/rate-limit-connections.rate-tcp: '500'

we have to find a way to keep existing annotations of the route in place.

[DerekRoberts]

Confluence guide that might help us update CSRs and keys without replacing routes. Previous attempt was rejected by Tier 3. See JIRA for details (but it was our fault).
https://apps.nrs.gov.bc.ca/int/confluence/display/ALCS/Certificate+Renewal#CertificateRenewal-GenerateaCertificateSigningRequest(CSR)