Clean up returns from LDP reads

[dlamoris]

The GETs for orgs, repos, branches, locks (primarily repos) are returning too much info that are already available via child ldp endpoints. Also to more align with ldp-dc spec, the construct query should include the ldp predicates that indicates org contain repo, repo contain branches, locks, commits.
https://www.w3.org/TR/ldp/#ldpc
example:
desired result for org get (ldp:contains is from basic container, direct container gets more complicated...need more examples):

m-org:open-mbee rdf:type mms:Org ;
	dct:title "OpenMBEE"@en ;
	mms:etag "bea1d206-0fad-40bc-9a4b-6a7692a2141f" ;
	mms:id "open-mbee"  ;
        ldp:contains <http://layer1-service/orgs/open-mbee/repos/new-repo> .

orgs: https://github.com/Open-MBEE/flexo-mms-layer1-service/blob/feat/ldp/src/main/kotlin/org/openmbee/flexo/mms/routes/ldp/OrgRead.kt#L42
Orgs get is including all the orgs' repos' triples even though repos can be gotten via /orgs/{orgid}/repos

repos: https://github.com/Open-MBEE/flexo-mms-layer1-service/blob/feat/ldp/src/main/kotlin/org/openmbee/flexo/mms/routes/ldp/RepoRead.kt#L53
Same issue as orgs, plus it's returning the entire repo metadata graph, which /repos/{repoid}/branches, /repos/{repoid}/locks, /repos/{repoid}/commits should be used instead (commits endpoint is requested from #117 )

branches/locks: https://github.com/Open-MBEE/flexo-mms-layer1-service/blob/feat/ldp/src/main/kotlin/org/openmbee/flexo/mms/routes/ldp/BranchRead.kt#L36
I don't think there's actually anything that uses mms:branch and mms:lock as predicate