chore(Code coverage): Updated coverage.ps1 script

coverage.ps1

@@ -0,0 +1,31 @@
+if(Test-Path -Path coverage)
+{
+  Remove-Item .\coverage -recurse
+}
+
+dotnet restore
+
+if((Test-Path -Path packages))
+{
+    Remove-Item .\packages -recurse
+}
+
+New-Item -path . -name packages -itemtype directory
+nuget install -Verbosity quiet -OutputDirectory packages -Version 4.6.519 OpenCover
+nuget install -Verbosity quiet -OutputDirectory packages -Version 2.4.5.0 ReportGenerator
+
+New-Item -path . -name coverage -itemtype directory
+
+$openCover = '.\packages\OpenCover.4.6.519\tools\OpenCover.Console.exe'
+
+ForEach ($folder in (Get-ChildItem -Path .\test -Directory)) 
+{
+    $targetArgs = '-targetargs: test ' + $folder.FullName + ' -c Release -f netcoreapp2.0'
+    $filter = '-filter:+[IBM.Cloud.SDK.Core*]*-[*Tests*]*-[*Example*]*'
+    & $openCover '-target:C:\\Program Files\\dotnet\\dotnet.exe' $targetArgs '-register:user' $filter '-oldStyle' '-mergeoutput' '-hideskipped:File' '-searchdirs:$testdir\\bin\\release\\netcoreapp2.0' '-output:coverage\\coverage.xml'
+}
+
+$reportGenerator = '.\packages\ReportGenerator.2.4.5.0\tools\ReportGenerator.exe'
+& $reportGenerator -reports:coverage\coverage.xml -targetdir:coverage -verbosity:Error
+
+Remove-Item .\packages -recurse