Use core functions that are faster for test file creation.
To support large requests for hashes, the core hash function
must support large hashes without recursion. PHP has a default
recursion depth of 100 and long hashes don't support this.
Remove transactions as they create performance problems for larger
courses and doesn't introduce significant benefit for developers.
Performance changes meant the times were much faster, a reasonable
guess was taken on performance of an average machine.
Moving it to course_backend keeping generic
methods and attributes in backend class.
AMOS BEGIN
MOV [size_0,tool_generator],[coursesize_0,tool_generator]
MOV [size_1,tool_generator],[coursesize_1,tool_generator]
MOV [size_2,tool_generator],[coursesize_2,tool_generator]
MOV [size_3,tool_generator],[coursesize_3,tool_generator]
MOV [size_4,tool_generator],[coursesize_4,tool_generator]
MOV [size_5,tool_generator],[coursesize_5,tool_generator]
AMOS END
