The #11526 was badly rebased just before beta1 relase and few
lines installing the providers were lost.


setup.py
]
all_dbs = (
    cassandra
    + cloudant
    + druid
    + exasol
    + hdfs
    + hive
    + mongo
    + mssql
    + mysql
    + pinot
    + postgres
    + presto
    + vertica
)
devel = [
    'beautifulsoup4~=4.7.1',
    'black',
    'blinker',
    'bowler',
    'click~=7.1',
    'contextdecorator;python_version<"3.4"',
    'coverage',
    'docutils',
    'flake8>=3.6.0',
    'flake8-colors',
    'flaky',
    'freezegun',
    'github3.py',