Previous location left it inderminate what the initial state would be.

Refs #13277

Refs #13262

It now uses the same libraries for Ubuntu utopic and vivid as in thrusty

This is required ever since we started to bundle the ParaView libs.

Also removed need for performing scl enable on RHEL7

This reverts commit 8efc4480, reversing
changes made to fbe8a6f8.

This is useful for the standalone system tests that won't necessarily
have all of the Mantid build dependencies installed.
Refs #10870

CMake now writes out two text files containing the location of the
data files and the requested default save directory.
The save directory now defaults to outside the source tree making it
easier to clear away.
Refs #10870

This option is available in Frameworks/Geometry/CMakeLists.txt but
not documented or exposed to the cmake-gui

Refs #10617

Refs #10821