Move GCP proxy code to the old [] proxy's location

1. Moved code for the GCP proxy to where the [] proxy code used to live.
3. Corrected reference to the GCP proxy location.
4. Misc changes to make ErrorProne and various tools happy.

+diekmann to LGTM terraform whitelist change.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=213630560

java/google/registry/proxy/terraform/modules/input.tf

@@ -0,0 +1,47 @@
+# GCP project in which the proxy runs.
+variable "proxy_project_name" {}
+
+# GCP project from which the proxy image is pulled.
+variable "gcr_project_name" {}
+
+# The base domain name of the proxy, without the whois. or epp. part.
+variable "proxy_domain_name" {}
+
+# The GCS bucket that stores the encrypted SSL certificate.
+variable "proxy_certificate_bucket" {}
+
+# Cloud KMS keyring name
+variable "proxy_key_ring" {
+  default = "proxy-key-ring"
+}
+
+# Cloud KMS key name
+variable "proxy_key" {
+  default = "proxy-key"
+}
+
+# Node ports exposed by the proxy.
+variable "proxy_ports" {
+  type = "map"
+
+  default = {
+    health_check = 30000
+    whois        = 30001
+    epp          = 30002
+    http-whois   = 30010
+    https-whois  = 30011
+  }
+}
+
+# Node ports exposed by the canary proxy.
+variable "proxy_ports_canary" {
+  type = "map"
+
+  default = {
+    health_check = 31000
+    whois        = 31001
+    epp          = 31002
+    http-whois   = 31010
+    https-whois  = 31011
+  }
+}