Cobertura report generation emits NaN as complexity for async functions

[david-schneider-tfs]

Describe the bug
This might be an extension of #606. When using -reporttypes:Cobertura the resulting output file will have 'complexity="NaN"' for async functions. This appears to be a regression as it is not an issue in 4.x versions.

Looking in the report builder it looks like there is a disagreement over the method name for async functions. For example, with the attached sample file the codeElement parsed from the file has a method with the FullName of MoveNext() while the Name is AddAsync().

To Reproduce
I've attached a sample file that can be used as an input that will show the issue.
sampleCoberturaReport.txt

When that file is used as an input report, the output report will have the following:

<method name="AddAsync" signature="()" line-rate="1" branch-rate="1" complexity="NaN">
              <lines>
                <line number="51" hits="11" branch="false" />
              </lines>
            </method>
<method name="AddOneAsyncTask" signature="()" line-rate="0" branch-rate="1" complexity="NaN">
              <lines>
                <line number="55" hits="0" branch="false" />
                <line number="56" hits="0" branch="false" />
              </lines>

[danielpalme]

I fixed this problem. Next release will contain the change!

[danielpalme]

Release 5.1.26 is now available.