Junit xml reporter (time attribute for testcases in report)

In JUnit reporter "time" attribute for each testcase was added
Tests on JUnit reporter were rewritten and now they're using XML DOM (GDataXMLNode) framework rather text matching
before:
```
<testcase classname="Cedar" name="TestName">
```
after:
```
<testcase classname="Cedar" name="TestName" time="1.3">
```