change name eo_class_classes_get to _mro_get

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
Merge branch 'hotfix'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge commit 'b0db153ea914625e726ceae1005747694a05ae86'
Merge commit '03e812f8da5a173f442a09b6f58b6c95b1052198'
Merge 'develop': callback generation, eo_unref in simulation
add hash of op_prop by op_id

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
add db init

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
Merge branch 'develop': add test_button example