Add missing hoverdoc for 'vm_extensions' property

headless-services/bosh-language-server/src/main/java/org/springframework/ide/vscode/bosh/BoshCloudConfigSchema.java

@@ -132,7 +132,6 @@ public class BoshCloudConfigSchema extends SchemaSupport implements YamlSchema {
 		for (YType defType : getDefinitionTypes()) {
 			toplevelType.require(Constraints.uniqueDefinition(astTypes, defType, YamlSchemaProblems.problemType("BOSH_CC_DUPLICATE_"+defType)));
 		}
-
 	}
 
 	private YType createNetworkBlockSchema(BoshModels models) {

headless-services/bosh-language-server/src/main/resources/cloud-config/CloudConfig/vm_extensions.md

@@ -0,0 +1,10 @@
+Specifies the [VM extensions](https://bosh.io/docs/terminology.html#vm-extension) available to deployments.
+
+Example:
+
+	vm_extensions:
+	- name: pub-lbs
+	  cloud_properties:
+	    elbs: [main]
+
+Any IaaS specific configuration could be placed into a VM extension’s `cloud_properties`.