Bugfix/log merging

[Forestsoft-de]

Ive detected that merging of logs doesnt work. You check in your testcase if an file exists but the file contains only <testsuites /> Check Line 85 to see how its fixed.

Ive added an testcase for that behavior and use a dataset of my 2 phpunit runs.

We should get rid of calculation for each node also, because im sure that phpunit make a great job here and we should calulate the top node only.

Line 98 Adding 0 as a default value breaks sonar with importing any result because its not able to validate the file path.

In Line 145 we add the Test result to the merged file also.

Br Sebastian