Fixed travis build

Author: kevzlou7979

.travis.yml

@@ -22,7 +22,7 @@ before_install:
 - mvn install -DskipTests=true -DdryRun=true
 - cd ..
 # install the gwt-material-table library before we build the demo
-- git clone -b 201710bd_onload https://github.com/GwtMaterialDesign/gwt-material-table.git
+- git clone -b rework/201710bd_onload https://github.com/GwtMaterialDesign/gwt-material-table.git
 - cd gwt-material-table
 - mvn install -DskipTests=true -DdryRun=true
 - cd ..