Catalog registration page optimization.

[Aireed]

Currently, the page is bind
I think there are several points that need to be optimized now.

1. The registered information is strongly related to the Hadoop system.
2. it's a little complicated for registration

[Aireed]

@baiyangtx @zhoujinsong

[xxubai]

+1

[baiyangtx]

Truely, I think we should add a selection for storage system. and only upload site.xml if it's a hadoop system.

[majin1102]

+1
decoupled with Hadoop is always a good idea, shall we discuss some details?