Returns true if there is a system property with the supplied name
whose value matches the expected value. The
and parameters are required, and the parameter
value supplied is the expected system property value, ignoring case.
This rule takes an optional parameter
which, if true, will test whether the value of the system property
contains, ignoring case, the supplied property value, rather
than matching the entire string. Boolean.valueOf(String)
is
used to determine whether the value supplied to
is true or false.