Install MQ startup scripts and fix installation of MQ executables (#2403)

Create MQ startup scripts to be installed already at the configuration stage and store the in the build tree. The difference between the scripts used in the build tree and the scripts finally installed are the hardcoded directory information inside. In the scripts to be used inside the build directory this links to the source and the build directories whereas it links to the installation directory in case of the scripts which are installed. Copy the scripts during installation to the correct directory. Install the MQ executables in the same directory structure as in the build directory.

Correct RPATH information in the executables

When building the executables the needed PATH information to find necessary libraries is stored in the executable. This PATH information is now also present in the installed executables such that they work without adding PATH information to the environment.