Repositories are not sync during adding a new organisation

Issue Summary

Repositories are not sync after adding a new organisation during DvcsScheduledJob.syncOrganizations().

Steps to Reproduce

1. Add a new organisation while DvcsScheduledJob.syncOrganizations() is running, for example add Thread.sleep() in this method RepositorySyncServiceImpl.syncReposWithUpdates() and while the thread is sleeping we have to add another organisation. In this case adding will be interrupted in RepositorySyncServiceImpl.syncRepositoryList() because of clusterLockService.getLockForName(SYNC_REPOSITORY_LIST_LOCK).

Expected Results

The sync works for all repos for all organisations. 

Actual Results

Repositories for an organisation weren't added.

Workaround

Customer can change lastPolled for past date for example the beginning of 1970s. In column  LAST_POLLED in  AO_E8B6CC_ORGANIZATION_MAPPING  table. After this sync of the organisation will be performed during next scheduled job.

Technical explanation:

When we add a new organization we create it and save into db in AddGithubOrganization.doAddOrganization() then we start RepositorySyncServiceImpl.syncRepositoryList() and in this method we stop because of the Lock. The organization was created but we didn't get any repositories. At the next scheduledJob we will iterate through organizations, get and synchronize repos with GithubCommunicator.getRepositoriesWithUpdates  * and the problem is, that in the end of it there is a method filterRepositoriesWithUpdates()  which iterates through repositories and check if pushed date of repo is after the date when organization was synchronized last time (field lastPolled into Organisation.class{*}) if yes this repo will be added to the list. And here is the issue, because when we created the organization we setted lastPolled date by default into DB and it always will be after the pushed date of all repos of this organization so we wouldn't get any repositories.