added missing dependencies (coverage & psycopg2)

mc_backend/requirements.txt

@@ -11,6 +11,7 @@ cffi==1.14.0
 chardet==3.0.4
 click==7.1.2
 conllu==2.3.2
+coverage==5.1
 cycler==0.10.0
 decorator==4.4.2
 docutils==0.15.2
@@ -40,6 +41,8 @@ MyCapytain==3.0.2
 networkx==2.4
 numpy==1.18.3
 Pillow==7.1.2
+psycopg2==2.8.5
+psycopg2-binary==2.8.5
 pycparser==2.20
 PyLD==2.0.2
 pyparsing==2.4.7

mc_backend/tests.py

 """Unit tests for testing the application functionality."""
-# TODO: TEST BLINKER & GUNICORN IMPORTS
+# TODO: TEST BLINKER, GUNICORN, PSYCOPG2-BINARY AND COVERAGE IMPORTS
 import copy
 import logging
 import ntpath