adopted latest lsp4e api changes further since they are now in lsp4e 0.5.x snapshot builds

eclipse-language-servers/org.springframework.tooling.boot.java.ls/src/org/springframework/tooling/boot/java/ls/DelegatingStreamConnectionProvider.java

@@ -83,6 +83,11 @@ public class DelegatingStreamConnectionProvider implements StreamConnectionProvi
 		return this.provider.getOutputStream();
 	}
 
+	@Override
+	public InputStream getErrorStream() {
+		return provider.getErrorStream();
+	}
+
 	@Override
 	public void stop() {
 		this.provider.stop();
@@ -125,7 +130,4 @@ public class DelegatingStreamConnectionProvider implements StreamConnectionProvi
 		this.languageServer.getWorkspaceService().didChangeConfiguration(new DidChangeConfigurationParams(settings));
 	}
 
-	public InputStream getErrorStream() {
-		return provider.getErrorStream();
-	}
 }

eclipse-language-servers/org.springframework.tooling.boot.java.ls/src/org/springframework/tooling/boot/java/ls/SpringBootJavaLanguageServerViaSocket.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2017 Pivotal, Inc.
+ * Copyright (c) 2017, 2018 Pivotal, Inc.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -50,6 +50,11 @@ public class SpringBootJavaLanguageServerViaSocket implements StreamConnectionPr
 		return outputStream;
 	}
 
+	@Override
+	public InputStream getErrorStream() {
+		return null;
+	}
+
 	@Override
 	public void stop() {
 		if (socket != null) {
@@ -61,9 +66,4 @@ public class SpringBootJavaLanguageServerViaSocket implements StreamConnectionPr
 		}
 	}
 
-	public InputStream getErrorStream() {
-		// TODO Auto-generated method stub
-		return null;
-	}
-
 }