Adds missing dependency to the documentation

Trove depends on MySQL-python package, to compile and install it is
required libmysqlclient-dev, otherwise the installation procedure
described in 'doc/source/dev/manual_install.rst' will fail in recently
installed boxes.

Closes-Bug: #1261525
Change-Id: I0cc325eb7efb056efe9682fa3478795ae025bfa1
Removes BuiltInstanceTasks.get_volume_mountpoint

Reasons:
- Method is not being used in the project.
- Method has an unassigned variable used volume_id.

Changes:
- Removes get_volume_mountpoint from trove.taskmanager.models.

Change-Id: I2942a4cc952a473dd1ed1d52c8cb2205566b68ae
Closes-Bug: #1263371
Adds LOG in event_simulator.py

Reasons:
- Module method event_simulator_sleep uses LOG, but LOG was nowhere
  implemented in module.

Changes:
- Added LOG in the module.

Change-Id: I0ddee7a5d933317e3ad0add4b791e945f000629d
Closes-Bug: #1264721
Enabled F403 flake8 rule

Reasons:
- F403 is disabled.
- code contains "import *" statements.

Changes:
- Updates tox.ini to enable F403 rules.
- Updates code for F403 violation.

Change-Id: If932a910c073ae7bffb74908495f35dbc4f4d1f9
Closes-Bug: #1264724
Removes deprecated usage of BaseException.message

Reasons:
- util\mysql.py is using deprecated BaseException.message
- message pops up in integration tests logs too.

Changes:
- Fixed the warning messages during tests.

Change-Id: I8bfe1cb8b1755d5481eda8d0b660340b04d2a171
Closes-Bug: #1267201
Log service_status.status instead of service_status

Reasons:
- While printing the service status to log instead of printing status
  it prints the object id for service_status object.

Changes:
- Replaces service_status by service_status.status.
- Now it prints the service status to the log.

Change-Id: I98b78eb065bb6a2bce31a9dfcc591423e653dbae
Closes-Bug: #1265141
Fixed misspelled help message in cfg.py

Reasons:
- Help message for exists_notification_ticks has misspelled
  reference to report_intevals.

Changes:
- Corrected report_intevals to report_intervals.

Change-Id: Iac13298a5f1a9fa938283982a9e52455c0ef0ae9
Closes-Bug: #1267822
Fixup indentation errors found by Pep8 1.4.6+

Closes-Bug: #1267994

Change-Id: I2662c863e21baa6a290311ec8eb12a01193eed94
Merge "Fixup indentation errors found by Pep8 1.4.6+"
Merge "Adds missing dependency to the documentation"
Merge "Removes deprecated usage of BaseException.message"
Merge "Log service_status.status instead of service_status"
Merge "Adds LOG in event_simulator.py"
Merge "Enabled F403 flake8 rule"
Merge "Removes BuiltInstanceTasks.get_volume_mountpoint"