Need to disable distributed installation for non-root user as it is no longer supported

Build tested: 1.2.4-1 1st RC

The default installation mode for postConfigure is non-distributed. There is an optional "-d" switch to indicate distributed installation mode. But distributed installation for non-root user is no longer supported. Therefore, we need to disable this installation combination. Otherwise, installation would still complete, but ColumnStore log directory will not be created and logging will not be setup.

When running postConfigure, if distributed installation is specified for non-root user, we should output a messages stating that such installation is not support and abort post configuration.