fix missing exception

Author: hauner

src/main/kotlin/io/openapiprocessor/spring/processor/ProcessingException.kt

@@ -0,0 +1,12 @@
+/*
+ * Copyright 2022 https://github.com/openapi-processor/openapi-processor-core
+ * PDX-License-Identifier: Apache-2.0
+ */
+
+package io.openapiprocessor.spring.processor
+
+class ProcessingException(ex: Exception): RuntimeException(ex) {
+
+    override val message: String
+        get() = "failed to run openapi-processor-spring!"
+}

src/main/kotlin/io/openapiprocessor/spring/processor/SpringProcessor.kt

@@ -9,7 +9,6 @@ import io.openapiprocessor.core.converter.ApiConverter
 import io.openapiprocessor.core.converter.ApiOptions
 import io.openapiprocessor.core.converter.OptionsConverter
 import io.openapiprocessor.core.parser.Parser
-import io.openapiprocessor.core.writer.ProcessingException
 import io.openapiprocessor.core.writer.WriterFactory
 import io.openapiprocessor.core.writer.java.*
 import io.openapiprocessor.spring.Version