The missing code coverage is caused by compatibility issue between PowerMock and Jacoco.

The issues is that Jacoco does not like PowerMock instrumentation

Here is a detail explanation: 

https://github.com/powermock/powermock/wiki/Code-coverage-with-JaCoCo

To reproduce the problem,  pick any project that has a junit which uses PowerMock.  Run the following  mvn commands to generate the issue: 

mvn clean install

mvn verify

you should see the WARNING in the logs

[INFO] — jacoco-maven-plugin:0.7.2.201409121644:report (post-unit-test) @ appc-dg-util-bundle —

[INFO] Analyzed bundle 'APPC DG Util - Bundle' with 4 classes

[WARNING] Classes in bundle 'APPC DG Util - Bundle' do no match with execution data. For report generation the same class files must be used as at runtime.

[WARNING] Execution data for class org/openecomp/appc/dg/util/impl/ExecuteNodeActionImpl does not match.

[INFO]