[HOTFIX] SPARK-1637: There are some Streaming examples added after the PR #571 was last updated.

This resulted in Compilation Errors.
cc @mateiz project not compiling currently.

Author: Sandeep <sandeep@techaddict.me>

Closes #673 from techaddict/SPARK-1637-HOTFIX and squashes the following commits:

b512f4f [Sandeep] [SPARK-1637][HOTFIX] There are some Streaming examples added after the PR #571 was last updated. This resulted in Compilation Errors.
(cherry picked from commit fdae095de2daa1fc3b343c05e515235756d856a4)

Signed-off-by: Patrick Wendell <pwendell@gmail.com>