Remove configuration parameter Q_SRV_EXTRA_DEFAULT_OPTS

According to the comments in stack.sh the configuration parameter
Q_SRV_EXTRA_DEFAULT_OPTS should be removed during the Juno cycle.

Change-Id: I2a00c924cd51dab00b56cdab1e48e32ffa007de4
Merge "Remove configuration parameter Q_SRV_EXTRA_DEFAULT_OPTS"