[JCLOUDS-1020] fix query parameter name in Docker's BuildOptions
diff --git a/docker/src/main/java/org/jclouds/docker/options/BuildOptions.java b/docker/src/main/java/org/jclouds/docker/options/BuildOptions.java
index 6653a56..15d95e0 100644
--- a/docker/src/main/java/org/jclouds/docker/options/BuildOptions.java
+++ b/docker/src/main/java/org/jclouds/docker/options/BuildOptions.java
@@ -21,7 +21,7 @@
 public class BuildOptions extends BaseHttpRequestOptions {
 
    public BuildOptions tag(String tag) {
-      this.queryParameters.put("tag", tag);
+      this.queryParameters.put("t", tag);
       return this;
    }