Updated Maven repositories.
Updated Maven repositories.

Now uses new IgniteRealtime repositories.

Jitsi repository that provides SNAPSHOTs is explicitly added. Note that the Jitsi project
uses a non-standard way to perform their releases. Some projects (that ofmeet uses) are
'released' using a timestamped SNAPSHOT, instead of what would in Maven context be a
proper release.

igniterealtime/ofmeet-openfire-plugin,igniterealtime/ofmeet-openfire-plugin,igniterealtime/ofmeet-openfire-plugin