WIP: get lvalert-overseer from gitlab for python3 compatibility

requirements.txt

@@ -17,7 +17,9 @@ ipdb==0.10.2
 ipython==5.5.0
 lalsuite==6.53 # undocumented requirement for lscsoft-glue
 ligo-lvalert==1.5.6
-ligo-lvalert-overseer==0.1.3
+# Temporary pin of lvalert-overseer for Python 3 update
+git+https://git.ligo.org/lscsoft/lvalert-overseer.git@python3-overseer#egg=ligo-lvalert-overseer
+#ligo-lvalert-overseer==0.1.3
 lscsoft-glue==1.60.0
 lxml==4.2.0
 matplotlib==2.0.0