[SPARK-2464][Streaming] Fixed Twitter stream stopping bug

Stopping the Twitter Receiver would call twitter4j's TwitterStream.shutdown, which in turn causes an Exception to be thrown to the listener. This exception caused the Receiver to be restarted. This patch check whether the receiver was stopped or not, and accordingly restarts on exception.

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #1577 from tdas/twitter-stop and squashes the following commits:

011b525 [Tathagata Das] Fixed Twitter stream stopping bug.

(cherry picked from commit a45d5480f65d2e969fc7fbd8f358b1717fb99bef)
Signed-off-by: Tathagata Das <tathagata.das1565@gmail.com>
Revert "[maven-release-plugin] prepare for next development iteration"

This reverts commit baf92a0f2119867b1be540085ebe9f1a1c411ae8.
Revert "[maven-release-plugin] prepare release v1.0.1-rc3"

This reverts commit 70ee14f76d6c3d3f162db6bbe12797c252a0295a.
Updating versions for 1.0.2 release.