Unable to open multiple transactions to a single netconf device at a time

When two (or more) standalone applications write to the same netconf device different data tree at the same time one transaction will fail.
The problem that we encountered is:
Two standalone applications (VBD and GBP) are writing data to the same node but different data tree at the same time. Since Netconf is not capable to handle concurrent transactions from more sources to the same device at once, one of the transaction will fail with an exception:
2017-03-03 15:17:05,041 | ERROR | CommitFutures-4 | NetconfProxyDOMTransaction | 311 - org.opendaylight.netconf.topology-singleton - 1.2.0.SNAPSHOT | RemoteDevice

: Failed to open new transaction
java.lang.IllegalStateException: Transaction is already opened for another user