Add extra parameter to accept additional configuration during VM deployment

Author: Dingane Hlaluku

api/src/main/java/org/apache/cloudstack/api/ApiConstants.java

@@ -719,6 +719,8 @@ public class ApiConstants {
     public static final String LAST_ANNOTATED = "lastannotated";
     public static final String LDAP_DOMAIN = "ldapdomain";
 
+    public static final String EXTRA_CONFIG = "extraconfig";
+
     public enum HostDetails {
         all, capacity, events, stats, min;
     }

api/src/main/java/org/apache/cloudstack/api/command/user/vm/DeployVMCmd.java

@@ -200,6 +200,9 @@ public class DeployVMCmd extends BaseAsyncCreateCustomIdCmd implements SecurityG
             " an optional parameter used to create additional data disks from datadisk templates; can't be specified with diskOfferingId parameter")
     private Map dataDiskTemplateToDiskOfferingList;
 
+    @Parameter(name = ApiConstants.EXTRA_CONFIG, type = CommandType.STRING, since = "4.12", description = "an optional URL encoded string that can be passed to the virtual machine upon successful deployment", authorized = { RoleType.Admin })
+    private String extraConfig;
+
     /////////////////////////////////////////////////////
     /////////////////// Accessors ///////////////////////
     /////////////////////////////////////////////////////