BMI Initialize leaks file handle

[hellkite500]

The initialization code for BMI opens the config file but never closes it. This can lead to file handle exhaustion on a system and cause crashes (in the case of ngen which initializes many independent model instances).

Current behavior

Opens config file, never closes it.

Expected behavior

Opens config file, closes it when done reading.

Steps to replicate behavior (include URLs)

1. Best seen running ngen with large number of CFE bmi instances (greater than the number of allowed open files on the system), it will crash on most systems.