Metacat

remove old access rules for a data object when they are being updated by rules contained in an EML document. Now the OnlineDataAccessTest EML 2.1.0 tests pass.
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5560

construct the proper previousDocId when checking for update permission

for now, look up SystemMetadata directly from the table otherwise we won't have the latest access information. Need to refresh the in-memory copy everytime we edit the access policy via Metacat (includes EML parser)

check previous revision for permissions to update (includes data described by EML)

use correct "rev" column in xml_revisions table

refactor Metacat access handling to be on a per-revision basis so that it more closely aligns with the DataONE approach
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5560

To avoid id generation conflicts happening at the same millisecond, append a 5 character random string to the end of the docid.

retry: add node name in the correct order for predicate navigation
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5561

add node name in the correct order for predicate navigation
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5561

handle queries with predicates correctly.
when docids are used in the return field look up, we need to make sure they are included in the values in the correct order for their corresponding parameter place holders (?)