Temporarily use a self-signed cert for nerc-ocp-test

Install a temporary certificate to resolve the issued noted in [PR 366].
This permits Vault to authenticate the API certificate presented by
nerc-ocp-test.

This is a temporary measure pending a more robust solution for issuing
internally trusted certificates.

[PR 366]: OCP-on-NERC/nerc-ocp-config#366

config/clusters/nerc-ocp-test.jsonnet

@@ -13,7 +13,7 @@ local service_account_namespaces = [
 cluster(
   "nerc-ocp-test",
   "https://api.nerc-ocp-test.rc.fas.harvard.edu:6443",
-  importstr "certs/letsencrypt_ca.crt",
+  importstr "certs/nerc_test_api.crt",
   importstr "tokens/nerc-ocp-test.txt",
   service_account_namespaces,
 )

lib/certs/nerc_test_api.crt

@@ -0,0 +1,32 @@
+-----BEGIN CERTIFICATE-----
+MIIFcjCCA1qgAwIBAgIUFO28ksaoJjV1yzYQnJvRxYPg7sgwDQYJKoZIhvcNAQEL
+BQAwLzEtMCsGA1UEAwwkYXBpLm5lcmMtb2NwLXRlc3QucmMuZmFzLmhhcnZhcmQu
+ZWR1MB4XDTI0MDIxMTIzMTk0MloXDTM0MDIwODIzMTk0MlowLzEtMCsGA1UEAwwk
+YXBpLm5lcmMtb2NwLXRlc3QucmMuZmFzLmhhcnZhcmQuZWR1MIICIjANBgkqhkiG
+9w0BAQEFAAOCAg8AMIICCgKCAgEAp9iKDvt1ooW6JtDr0hdfaiMjRpgnvp/vKv2A
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+mvKbJ6rzfDVhfnF6i0jZtc3b2xeBhsSGI1m9jUcd5xM46dorlezYMsvhxJ+VtMmr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+-----END CERTIFICATE-----