For one, /etc/opt/ure was probably never used by anyone anyway, so meant just
needless file-stats during startup.  For another, accidentally created
~/.ure/javasettings_*.xml that later became stale were noted to cause trouble,
so that source is now closed.

For this to work, jvmfwk needs to be silent now if it cannot read/write any
shared/user javasettings_*.xml.

Change-Id: I332b5ebb9549dc6ccf7c99c439d9a3b61aeb5829