remove mvn site for travis ci since it is too slow
remove mvn site for travis ci since it is too slow

yiming187/apollo,ctripcorp/apollo,timothynode/apollo,yiming187/apollo,timothynode/apollo,nobodyiam/apollo,ctripcorp/apollo,timothynode/apollo,anycrane/apollo,lepdou/apollo,anycrane/apollo,lepdou/apollo,nobodyiam/apollo,yiming187/apollo,yiming187/apollo,bulletqi/netposa-config,nobodyiam/apollo,bulletqi/netposa-config,ctripcorp/apollo,nobodyiam/apollo,timothynode/apollo,anycrane/apollo,bulletqi/netposa-config,bulletqi/netposa-config,anycrane/apollo,lepdou/apollo,ctripcorp/apollo,lepdou/apollo