Unit Test Coverage For utils.py

[brycemcd]

Changes to utils.py are challenging to be made safely and quickly. Unit tests will help lower the barrier to making changes to the functions in this file and provide some additional documentation for new people developing EXOTIC. In order to provide adequate test coverage of the file, the following functions should be tested (arbitrary order):

• user_input
• init_params Tests and docs for init_params() function #883
• typecast_check Tests and documents typecase_check() function #886
• round_to_2 Test for round_to_2() #866
• get_val Tests and documents get_val() and add_sign() functions #882
• add_sign Tests and documents get_val() and add_sign() functions #882
• process_lat_long Tests and documents process_lat_long() in utils #876
• find Docs and tests for find #894
• open_elevation