[#3025] - upgrade packages for mezzanine and django upgrade compatibi…

…lity

requirements.txt

@@ -9,7 +9,7 @@ bagit==1.5.4
 bcrypt==3.1.4
 beautifulsoup4==4.5.3
 billiard==3.3.0.23
-bleach==2.0.0
+bleach==3.0.2
 celery==3.1.23
 cffi==1.11.5
 chardet==3.0.4
@@ -51,7 +51,7 @@ DoubleMetaphone==0.1
 drf-yasg==1.10.0
 ecdsa==0.13
 enum34==1.1.6
-filebrowser-safe==0.4.6
+filebrowser-safe==0.5.0
 flake8==3.5.0
 flex==6.13.2
 funcsigs==1.0.2
@@ -62,7 +62,7 @@ geojson==1.3.2
 geopy==1.16.0
 gevent==1.1.2
 google.foresite-toolkit==1.3.3
-grappelli-safe==0.4.5
+grappelli-safe==0.5.1
 greenlet==0.4.10
 gunicorn==19.6.0
 html5lib==0.9999999