test(developer): add tests for low-coverage modules in kmc

The following modules have low coverage, as of 18.0.219-beta. The process for adding coverage is fairly simple: examine the coverage log, pick some uncovered lines, and craft a test accordingly -- look at existing tests for patterns to follow (e.g. message-related tests usually take a fixture which generates the message).

```
[23:04:03] : [Step 2/6] [developer/src/common/web/utils] Coverage thresholds are currently 45%, which is lower than ideal.
[23:04:53] : [Step 2/6] [developer/src/kmc-analyze] Coverage thresholds are currently 70%, which is lower than ideal.
[23:05:03] : [Step 2/6] [developer/src/kmc-copy] Coverage thresholds are currently 75%, which is lower than ideal.
[23:05:37] : [Step 2/6] [developer/src/kmc-kmn] Coverage thresholds are currently 80%, which is lower than ideal.
[23:05:50] : [Step 2/6] [developer/src/kmc-ldml] Coverage thresholds are currently 75%, which is lower than ideal.
[23:06:12] : [Step 2/6] [developer/src/kmc-model-info] Coverage thresholds are currently 55%, which is lower than ideal.
[23:06:42] : [Step 2/6] [developer/src/kmc] Coverage thresholds are currently 50%, which is lower than ideal.
```