Allow TLS 1.2 for Receptor connections (#1300)

- Required for FIPS environment where TLS 1.3 is
not supported
- TLS 1.3 can still be used if the nodes
both agree to use during handshake.

roles/installer/templates/configmaps/config.yaml.j2

@@ -269,6 +269,7 @@ data:
         key: /etc/receptor/tls/receptor.key
         name: tlsclient
         rootcas: /etc/receptor/tls/ca/receptor-ca.crt
+        mintls13: false
     - work-signing:
         privatekey: /etc/receptor/signing/work-private-key.pem
         tokenexpiration: 1m