HPCC-12681 Not show WU Scope if no security setting

In WsWorkunits service and legacy ECLWatch, check if
a system has set LDAP feature authentication for
WsWorkunits. If not, the ECL WU Details page
should not set/display WU Scope field because the
restricted scope is only valid if the system has set
LDAP feature authentication for WsWorkunits.

The change for new ECLWatch UI will be in a separate
commit.

Signed-off-by: wangkx <kevin.wang@lexisnexis.com>
For simple values you really don't need to check the version in code like this.  The ESDL generated code will check the version when serializing the response.  Checking the version in code is useful when it will prevent extra work from being done.