Pytest-dbfixtures

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- [enhancements] removed all leftover code and limited documentation, directed to each indicidual packages.
- [enhancements] split out Redis fixtures into separate package. See `pytest-redis <https://pypi.python.org/pypi/pytest-redis/>`_
- [enhancements] split out RabbitMQ fixtures into separate package. See `pytest-rabbitmq <https://pypi.python.org/pypi/pytest-rabbitmq/>`_
- [enhancements] split out MySQL fixtures into separate package. See `pytest-mysql <https://pypi.python.org/pypi/pytest-mysql/>`_
- [enhancements] split out DynamoDB fixtures into separate package. See `pytest-dynamodb <https://pypi.python.org/pypi/pytest-dynamodb/>`_

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- [enhancement] split out PostgreSQL fixtures into separate package. See `pytest-postgresql <https://pypi.python.org/pypi/pytest-postgresql/>`_
- [enhancement] split out MongoDB fixtures into separate package. See `pytest-mongo <https://pypi.python.org/pypi/pytest-mongo/>`_

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- [enhancements] Postgresql client fixture closes other postgresql connection to the database before droping database - prevents the fixture/tests from hanging in some cases
- [enhancements] mysql to use unique tmpdir option for mysql_* commands
- [enhancements] use semicolon to terminate postgresql CREATE/DROP DATABASE statements
- [bugfix] removed unneded dependency
- [enhancement] split out elasticsearch fixtures into separate package. See `pytest-elasticsearch <https://pypi.python.org/pypi/pytest-elasticsearch/>`_
- [feature] use tmpfile.gettempdir instead of hardcoded /tmp directory

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- [fix] support for rabbitpy 0.27.x
- [feature] Random port selection ports accept tuples and sets. replace string representation [backward incompatible]

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- [feature] Add support for delayTransientStatuses flag (DynamoDB)

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- [fix] Update DynamoDB in howtouse