Add test for Mage_Eav_Model_Entity_SetupTest::createEntityTables
Make entity_id columns unsigned

Since the <value_table>.entity_id column has a foreign key constraint on
the <entity_table>.entity_id field they have to be declared identical,
that is an unsigned column can't have constrained on a signed column.
Enable developer mode for test
Remove transactions in eav/entity_setup::createEntityTables

Since Varien_Db_Adapter_Pdo_Mysql::_checkDdlTransaction forbids using
transactions for DDL statements (create, alter, drop, ...), we need to
remove the beginTransaction, commit and rollback method calls
surrounding the table creation execution.
Fix test to account for table prefix
Refactor variable names to make less confusing
Make test work with or without a table prefix
Merge pull request #174 from magento/MAGE-6732

MAGE-6732