Missing MySQL Connector hidden imports in PyInstaller builds

[Raoul Snyman]

--- Exception Traceback ---
Traceback (most recent call last):
  File "<string>", line 44, in <module>
  File "openlp\core\__init__.py", line 437, in main
  File "openlp\core\__init__.py", line 142, in run
  File "openlp\core\common\registry.py", line 137, in execute
  File "openlp\core\lib\pluginmanager.py", line 54, in bootstrap_initialise
  File "openlp\core\lib\pluginmanager.py", line 102, in find_plugins
  File "C:\Program Files (x86)\OpenLP\plugins\songs\songsplugin.py", line
84, in __init__
    self.manager = Manager('songs', init_schema, upgrade_mod=upgrade)
  File "openlp\core\lib\db.py", line 238, in __init__
  File "openlp\core\lib\db.py", line 130, in upgrade_db
  File "openlp\core\lib\db.py", line 53, in init_db
  File "site-packages\sqlalchemy\engine\__init__.py", line 386, in
create_engine
  File "site-packages\sqlalchemy\engine\strategies.py", line 75, in create
  File "site-packages\sqlalchemy\dialects\mysql\mysqlconnector.py", line
107, in dbapi
ImportError: No module named 'mysql'

--- System information ---
Plataforma: Windows-10-10.0.15063-SP0

--- Library Versions ---
Python: 3.4.4
Qt5: 5.5.1
PyQt5: 5.5.1
QtWebkit: 538.1
SQLAlchemy: 1.0.11
SQLAlchemy Migrate: -
BeautifulSoup: 4.4.1
lxml: 3.4.4
Chardet: 2.3.0
PyEnchant: 1.6.6
Mako: 1.0.3
pyICU: 1.9.2
pyUNO

[Lesliê Cardoso da Silva (lesliecs)]

When config software to use mysql
exception

Traceback (most recent call last):
  File "openlp-run.py", line 44, in <module>
  File "openlp\core\__init__.py", line 439, in main
  File "openlp\core\__init__.py", line 142, in run
  File "openlp\core\common\registry.py", line 137, in execute
  File "openlp\core\lib\pluginmanager.py", line 53, in bootstrap_initialise
  File "openlp\core\lib\pluginmanager.py", line 103, in find_plugins
  File "C:\OpenLP\plugins\songs\songsplugin.py", line 85, in __init__
    self.manager = Manager('songs', init_schema, upgrade_mod=upgrade)
  File "openlp\core\lib\db.py", line 240, in __init__
  File "openlp\core\lib\db.py", line 147, in upgrade_db
  File "openlp\core\lib\db.py", line 52, in init_db
  File "site-packages\sqlalchemy\engine\__init__.py", line 387, in create_engine
  File "site-packages\sqlalchemy\engine\strategies.py", line 80, in create
  File "site-packages\sqlalchemy\dialects\mysql\mysqldb.py", line 110, in dbapi
ImportError: No module named 'MySQLdb'