ZF-3786: Unit test output problem.

Description

Correct output buffering management produces wrong tests results output. Some part of output is skipped.

Comments

Output failure happened because output ob_end_clean() was used twice. The root of the problem is test failure plus catching Exception instead of Zend_Rest_Server_Exception ($this->fail() PHPUnit functionality is also based on exceptions)

Updating for the 1.6.0 release.