change version to 0.3.0.3

Signed-off-by: Markus Jura <markus.jura@googlemail.com>
if "memcached.user" is not set or is empty => no authentication

Signed-off-by: Markus Jura <markus.jura@googlemail.com>
no memcached client shutdown during onStop method

Change necessary in case of unit testing. If each unit test is executed in a separate fake application then the all unit tests beside the first one would fail because of a "IllegalStateException: Shutting down (MemcachedConnection.java:641)" exception.

Signed-off-by: Markus Jura <markus.jura@googlemail.com>