[ANCHOR-936] Fix ktReferenceServerConfig is not populated correctly

kotlin-reference-server/build.gradle.kts

@@ -21,6 +21,7 @@ dependencies {
   implementation(variantOf(libs.java.stellar.sdk) { classifier("uber") })
 
   implementation(project(mapOf("path" to ":api-schema")))
+  implementation(project(":lib-util"))
 }
 
 tasks {

kotlin-reference-server/src/main/kotlin/org/stellar/reference/di/ConfigContainer.kt

@@ -1,6 +1,7 @@
 package org.stellar.reference.di
 
 import com.sksamuel.hoplite.*
+import org.stellar.anchor.util.StringHelper.dotToCamelCase
 import org.stellar.reference.data.Config
 import org.stellar.reference.data.LocationConfig
 
@@ -25,15 +26,14 @@ class ConfigContainer(envMap: Map<String, String>?) {
       val locationCfgBuilder =
         ConfigLoaderBuilder.default().addPropertySource(PropertySource.environment())
 
-      val cfgBuilder = ConfigLoaderBuilder.default()
-
       // Add environment variables as a property source for the config object
-      cfgBuilder.addPropertySource(PropertySource.environment())
+      val cfgBuilder = ConfigLoaderBuilder.default().addPropertySource(PropertySource.environment())
 
       // Add any environment variable overrides from the envMap
       envMap?.run {
-        locationCfgBuilder.addMapSource(this)
-        cfgBuilder.addMapSource(this)
+        val camelEnvMap = this.mapKeys { (key, _) -> dotToCamelCase(key) }
+        locationCfgBuilder.addMapSource(camelEnvMap)
+        cfgBuilder.addMapSource(camelEnvMap)
       }
 
       val locationConfig = locationCfgBuilder.build().loadConfigOrThrow<LocationConfig>()

lib-util/src/main/java/org/stellar/anchor/util/StringHelper.java

@@ -52,6 +52,34 @@ public static String toPosixForm(String camel) {
         .toUpperCase();
   }
 
+  /**
+   * Converts a dot-separated string to camelCase. For example: - "kt.reference.server.config"
+   * becomes "ktReferenceServerConfig"
+   *
+   * @param s The dot-separated string to be converted.
+   * @return A string in camelCase format.
+   * @throws NullPointerException If the input string is null.
+   */
+  public static String dotToCamelCase(String s) {
+    String[] parts = s.split("\\."); // Split by dot
+    StringBuilder result = new StringBuilder();
+
+    for (int i = 0; i < parts.length; i++) {
+      String part = parts[i];
+      if (part.isEmpty()) {
+        continue;
+      }
+      if (i == 0) {
+        // If it's the first part, leave it as is (in lowercase)
+        result.append(part);
+      } else {
+        // Capitalize the first letter of other parts
+        result.append(part.substring(0, 1).toUpperCase()).append(part.substring(1));
+      }
+    }
+    return result.toString();
+  }
+
   static Gson gson = GsonUtils.getInstance();
 
   /**