Unhandled NullReferenceException in CreateOnlineDatabaseBackup if TargetDatabaseName is not defined

[claycompton]

Currently, if the CreateOnlineDatabaseBackup job is invoked without TargetDatabaseName defined in the payload, an unhandled NullReferenceException is thrown. The below error log is representative.

<NuOps 3.0.1> D:\github.com\nuget.operations
[env:int] # nucmd work log -i 40abff20-6158-444f-8011-d29f670378a6 -pass $pass
trace: NuCmd v3.0.1.0
info : Fetching log data for Invocation 40abff20-6158-444f-8011-d29f670378a6...
http : GET https://api-work-0.int.nugettest.org/work/invocations/40abff20-6158-444f-8011-d29f670378a6/log
http : 200 https://api-work-0.int.nugettest.org/work/invocations/40abff20-6158-444f-8011-d29f670378a6/log
info : Log entries for Invocation 40abff20-6158-444f-8011-d29f670378a6.
info : ----------------------------------------------------------------
info : Starting invocation 40abff20-6158-444f-8011-d29f670378a6. Job: CreateOnlineDatabaseBackup. Runtime: NuGet.Service
s.Work.Jobs.CreateOnlineDatabaseBackupJob
info : Preparing to backup nuget-int-0-v2gallery on server jvhowicii4.database.windows.net
info : Getting list of databases on jvhowicii4.database.windows.net
info : Starting copy of nuget-int-0-v2gallery to Backup_2014Feb28_1952Z
info : Started copy of nuget-int-0-v2gallery to Backup_2014Feb28_1952Z
error: Invocation 40abff20-6158-444f-8011-d29f670378a6 faulted at 2014-02-28T19:52:29.2949305+00:00: System.NullReferenc
eException: Object reference not set to an instance of an object.
error: at NuGet.Services.Work.Jobs.CreateOnlineDatabaseBackupJob.ContinueCheckingBackup() in c:\TeamCity\App\buildAge
nt\work\c969dcfb8556c064\src\NuGet.Services.Work\Jobs\CreateOnlineDatabaseBackupJob.cs:line 159
error: at NuGet.Services.Work.Jobs.CreateOnlineDatabaseBackupJob.d__d.MoveNext() in c:\TeamCity\App\buildAge
nt\work\c969dcfb8556c064\src\NuGet.Services.Work\Jobs\CreateOnlineDatabaseBackupJob.cs:line 109
error: --- End of stack trace from previous location where exception was thrown ---
error: at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
error: at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
error: at NuGet.Services.Work.AsyncJobHandler`1.d__2.MoveNext() in c:\TeamCity\App\buildAgent\work\c969dc
fb8556c064\src\NuGet.Services.Work\Infrastructure\JobHandler.cs:line 116
info : ---------------------------------------------------------------
info : End of log for Invocation 40abff20-6158-444f-8011-d29f670378a6.
<NuOps 3.0.1> D:\github.com\nuget.operations

[analogrelay]

Duplicate of #1901