[DOC] Fix broken code block in jdbc document
[DOC] Fix broken code block in jdbc document

### What is this PR for?
Fix broken code block in jdbc document

### What type of PR is it?
Documentation

### Screenshots (if appropriate)
Before
<img width="1280" alt="screen shot 2016-06-21 at 2 46 58 pm" src="https://cloud.githubusercontent.com/assets/8503346/16247613/65aa78a2-37bf-11e6-9370-7d0bcba4cbf5.png">

After
<img width="1280" alt="screen shot 2016-06-21 at 2 47 14 pm" src="https://cloud.githubusercontent.com/assets/8503346/16247606/61ef7ad2-37bf-11e6-90a4-10234b18611e.png">

### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No

Author: Mina Lee <minalee@apache.org>

Closes #1061 from minahlee/doc/fixJdbc and squashes the following commits:

825fdb4 [Mina Lee] Fix broken code block in jdbc document

(cherry picked from commit f2702044709146285d7053d37b5138f60cf21729)
Signed-off-by: Jongyoul Lee <580258f4dc0f7b7fba6752c3e796a6cb1bdd91fd@apache.org>

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