ERT-734: Updated path to config files
ERT-734: Addes test_assert_true() for jobs.
ERT-734: Removed debug printf()
ERT-734: Added env switch to ert_test_context

The ert_test_context class will set the ERT_UI_MODE environment variable
to 'tui' or 'gui' depending on a flag in the alloc process. This must be
set correctly to load the site-config file correctly.
ERT-734: Updated test to use ert_test_context
ERT-734: Added function ert_test_context_get_cwd()
ERT-734: Fixed test to ensure correct case.
Merge pull request #603 from joakim-hove/ERT-734-fixup

Ert 734 fixup
ERT-736: Fixed rng realloc bug
ERT 736: Changed method name