PXD-2468: Add uniqueness check back (#266)

* Upgrade to gdcdatamodel 1.3.9
* Update to psqlgraph 1.2.3

requirements.txt

@@ -24,14 +24,14 @@ more-itertools==5.0.0
 -e git+https://git@github.com/uc-cdis/cdis_oauth2client.git@0.1.3#egg=cdis_oauth2client
 cdispyutils==0.2.12
 -e git+https://git@github.com/uc-cdis/datamodelutils.git@0.4.1#egg=datamodelutils
--e git+https://git@github.com/NCI-GDC/psqlgraph.git@1.2.0#egg=psqlgraph
+psqlgraph==1.2.3
 -e git+https://git@github.com/NCI-GDC/signpost.git@v1.1#egg=signpost
 # required for gdcdatamodel, not required for sheepdog
 -e git+https://git@github.com/uc-cdis/cdiserrors.git@0.1.1#egg=cdiserrors
 -e git+https://git@github.com/uc-cdis/cdislogging.git@master#egg=cdislogging
 -e git+https://git@github.com/NCI-GDC/cdisutils.git@f54e393c89939b2200dfae45c6235cbe2bae1206#egg=cdisutils
 -e git+https://git@github.com/uc-cdis/datadictionary.git@0.2.1#egg=gdcdictionary
--e git+https://git@github.com/uc-cdis/gdcdatamodel.git@1.3.7#egg=gdcdatamodel
+gdcdatamodel==1.3.9
 -e git+https://git@github.com/uc-cdis/indexclient.git@1.5.7#egg=indexclient
 -e git+https://git@github.com/NCI-GDC/python-signpostclient.git@ca686f55772e9a7f839b4506090e7d2bb0de5f15#egg=signpostclient
 -e git+https://git@github.com/uc-cdis/storage-client.git@0.1.7#egg=storageclient