Some errors in xmlconf/eduni/errata-2e test case descriptions

Some entries in errata2e.xml are not quite correct, which
poses problems for automated processing of the test suite:

1) rmt-e2e-18
    This test cases uses parameter and general entities. However, the description reads:

    <TEST RECOMMENDATION="XML1.0-errata2e" SECTIONS="E18" URI="E18.xml" ID="rmt-e2e-18"
    ENTITIES="parameter" OUTPUT="out/E18.xml" TYPE="valid">
    External entity containing start of entity declaration is base URI
    for system identifier
    </TEST>

    It should be ENTITIES="both"

2) rmt-e2e-36
    This test cases uses a DTD. However, the description is missing
    the ENTITIES="parameter" attribute:

    <TEST RECOMMENDATION="XML1.0-errata2e" SECTIONS="E36" URI="E36.xml" ID="rmt-e2e-36" TYPE="valid">
    An external ATTLIST declaration does not make a document non-standalone
    if the normalization would have been the same without the declaration
    </TEST>

3) rmt-e2e-60
    Same problem as with rmt-e2e-36, missing ENTITIES="parameter"

Karl