lcov reporter logging noise

[fotinakis]

With ember-cli-blanket enabled, I get noisy logs at the end of the test suite:

    ---
        Log: |
            { type: 'log', text: '{}\n' }
            { type: 'log', text: '{}\n' }
            { type: 'log', text: '{}\n' }
            { type: 'log', text: '{}\n' }
            { type: 'log', text: '{}\n' }
    ...

This is with: reporters: ['lcov'] and ember-cli-blanket 0.9.5.