(chocolatey#886) Update packages.config install logging

Update the debug logging when a packages.config file is being used to
output the start and end of the configuration on independent lines. This
allows us to update the test to get these start and end points and not
play guessing games with how long we think the output should be.
Updating this test allows Chocolatey Licensed Extension to be included
and the tests still pass.

src/chocolatey/infrastructure.app/services/ChocolateyPackageService.cs

@@ -793,7 +793,7 @@ private IEnumerable<ChocolateyConfiguration> get_packages_from_config(string pac
 
                     this.Log().Info(ChocolateyLoggers.Important, @"{0}".format_with(packageConfig.PackageNames));
                     packageConfigs.Add(packageConfig);
-                    this.Log().Debug(() => "Package Configuration: {0}".format_with(packageConfig.ToString()));
+                    this.Log().Debug(() => "Package Configuration Start:{0}{1}{0}Package Configuration End".format_with(System.Environment.NewLine, packageConfig.ToString()));
                 }
             }
 

tests/chocolatey-tests/commands/choco-install.Tests.ps1

@@ -247,9 +247,11 @@ Describe "choco install" -Tag Chocolatey, InstallCommand {
                 $Output = Invoke-Choco install $env:CHOCOLATEY_TEST_PACKAGES_PATH\alloptions.packages.config --confirm --verbose --debug
 
                 # This is based on two observations: The addition explicitly outputs that it's the Package Configuration.
-                # The configuration output is also about 80 lines.
-                $StartofPackageConfiguration = [array]::IndexOf($Output.Lines, "Package Configuration: CommandName='install'|")
-                $PackageConfigurationOutput = $Output.Lines[$StartofPackageConfiguration..($StartofPackageConfiguration+80)] -join [Environment]::NewLine
+                # The configuration output is about 80 lines.
+                $StartOfPackageConfiguration = [array]::IndexOf($Output.Lines, "Package Configuration Start:")
+                $EndOfPackageConfiguration = [array]::IndexOf($Output.Lines, "Package Configuration End")
+
+                $PackageConfigurationOutput = $Output.Lines[$StartofPackageConfiguration..$EndOfPackageConfiguration] -join [Environment]::NewLine
             }
 
             # We are explicitly passing in a bad username and password here.