Revert changes in KEYCLOAK-5621 (#4539)

adapters/oidc/adapter-core/src/main/java/org/keycloak/adapters/KeycloakDeploymentBuilder.java

@@ -58,7 +58,7 @@ public class KeycloakDeploymentBuilder {
         if (resource == null) throw new RuntimeException("Must set 'resource' in config");
         deployment.setResourceName(resource);
 
-        String realmKeyPem = adapterConfig.getRealmPublicKey();
+        String realmKeyPem = adapterConfig.getRealmKey();
         if (realmKeyPem != null) {
             PublicKey realmKey;
             try {

core/src/main/java/org/keycloak/representations/adapters/config/BaseRealmConfig.java

@@ -31,7 +31,7 @@ public class BaseRealmConfig {
     @JsonProperty("realm")
     protected String realm;
     @JsonProperty("realm-public-key")
-    protected String realmPublicKey;
+    protected String realmKey;
     @JsonProperty("auth-server-url")
     protected String authServerUrl;
     @JsonProperty("ssl-required")
@@ -53,12 +53,12 @@ public class BaseRealmConfig {
         this.realm = realm;
     }
 
-    public String getRealmPublicKey() {
-        return realmPublicKey;
+    public String getRealmKey() {
+        return realmKey;
     }
 
-    public void setRealmPublicKey(String realmPublicKey) {
-        this.realmPublicKey = realmPublicKey;
+    public void setRealmKey(String realmKey) {
+        this.realmKey = realmKey;
     }
 
     public String getAuthServerUrl() {