use UTF-8 encoding for openapi generated code

Author: andlinger

client/build.gradle

@@ -36,6 +36,16 @@ test {
  useJUnitPlatform()
 }
 
+tasks.withType(JavaCompile) {
+ configure(options) {
+ options.encoding = 'UTF-8'
+ }
+}
+
+javadoc {
+ options.encoding = 'UTF-8'
+}
+
 sourceSets {
  main {
  java {