[TASK] Cleanup irre_tutorial - remove backend module and sample data

Change-Id: If84b17a793a80a064f667a2624da8abc30438abc
[TASK] Rename fixture and test files

Change-Id: I3265fd3ab9fd54ea11bc66381e89bd5cfc445987
[TASK] Move duplicated code to the parent class

Change-Id: I6d6378edf7630e99293344b67e819cabdf4dacbd
[TASK] use namespaced class names

Change-Id: I2474496f2eb0c6f04e5fb2b1e08d8d7281209ab2
[TASK] Mark some tests as skipped.

Some tests are failing because the Core is buggy. Skip them for now.

Change-Id: I905f0568d932383273362f3b7ab14b3e5126a435
[TASK] Use namespaced class names

Change-Id: I4d33f1f704e9395bf50004d5cfb3b4e4503ad88a
[TASK] Remove loadTCA calls

Change-Id: I0e582d183c6efc810fe23624767d40a1b8b49946
[TASK] Refactor - fix typo in the method name "getWorkspaceVersionId"

Change-Id: I94869ceaab1d2c6746ebf1746e5da78c8e647f91
[TASK] Update ext_emconf

Change-Id: I383a2d38da4bacb1d6d5ed63b2556e79b853f8be
[TASK] Fix some typos

Change-Id: I5279896786763685a22183af7a0c49d4264a02be
[TASK] Fix class comment

Change-Id: Ic084b95974749146e825a1011606736025a1b90a