Increase slapos.toolbox version to 0.84

stack/slapos.cfg

@@ -142,7 +142,7 @@ slapos.libnetworkcache = 0.16
 slapos.rebootstrap = 4.1
 slapos.recipe.build = 0.40
 slapos.recipe.cmmi = 0.10
-slapos.toolbox = 0.83
+slapos.toolbox = 0.84
 stevedore = 1.21.0
 unicodecsv = 0.14.1
 xml-marshaller = 0.9.7
@@ -249,6 +249,10 @@ rpdb = 0.1.5
 # slapos.core==1.4.15
 supervisor = 3.3.3
 
+# Required by:
+# slapos.toolbox==0.84
+tzlocal = 1.5.1
+
 # Required by:
 # slapos.core==1.4.15
 uritemplate = 3.0.0