Convert prowizard to hio file access calls

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Allow loading of prowizard files from memory

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
[test] Test load of prowizard files from memory

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>