fix(java-sdk): blacklist IaaS service (#213)

Author: rubenhoenle

languages/java/blacklist.txt

@@ -1 +1,2 @@
 # Transitional file to disable generation for selected services
+iaas

scripts/generate-sdk/languages/java.sh

@@ -73,6 +73,7 @@ generate_java_sdk() {
 
     # Remove old contents of services dir (services/)
     rm -rf "${SERVICES_FOLDER}"
+    mkdir -p "${SERVICES_FOLDER}"
 
     warning=""
 
@@ -103,6 +104,7 @@ generate_java_sdk() {
         if grep -E "^$service$" "${ROOT_DIR}/languages/java/blacklist.txt"; then
             echo "Skipping blacklisted service ${service}"
             warning+="Skipping blacklisted service ${service}\n"
+            cp -r "${sdk_services_backup_dir}/${service}" "${SERVICES_FOLDER}"
             continue
         fi