Disable conversion of external sources to Kotlin by default

Author: fwcd

server/src/main/kotlin/org/javacs/kt/Configuration.kt

@@ -31,8 +31,8 @@ public data class IndexingConfiguration(
 public data class ExternalSourcesConfiguration(
     /** Whether kls-URIs should be sent to the client to describe classes in JARs. */
     var useKlsScheme: Boolean = false,
-    /** Whether external classes classes should be automatically converted to Kotlin. */
-    var autoConvertToKotlin: Boolean = true
+    /** Whether external classes should be automatically converted to Kotlin. */
+    var autoConvertToKotlin: Boolean = false
 )
 
 public data class Configuration(