Created the test_loop_exp_frq() dispersion unit test.
This checks the operation of the loop_exp_frq() function from the module specific_analyses.relax_disp.disp_data. It uses the data attached to the bug report at https://gna.org/bugs/?21665.
Authored by: bugman 2014-02-21
Parent: [r22231]
Child: [r22233]
