Warning in TEIP5-Test-dev

[martindholmes]

This has come up right before the 4.9.0 release, so I'm flagging it here rather than trying to fix it directly during the freeze:

Line 465 of extract-isosch.xsl issues a warning whenever a <sch:report> or <sch:assert> is a direct child of a <constraint> element. This warning is triggered by the following constraintSpec:

<constraintSpec ident="test_contextless_report" scheme="schematron" xml:lang="en">
              <desc>This <gi>constraintSpec</gi> is invalid because it
              has an <gi>sch:report</gi> that does not have a context
              (i.e., does not have a <tag>sch:rule
              context="…"</tag>.)</desc>
              <constraint>
                <sch:report test="false()">This rule never fires.</sch:report>
              </constraint>
            </constraintSpec>

This causes the warning to go into the build log and therefore the Jenkins build is tagged as unstable. Since this is a detest process, perhaps it's important that the warning message be triggered, but surely it should be captured in the detest.log and checked rather than output to the console. Not sure exactly what the solution should be here.