Use new slapos.core version

component/slapos/buildout.cfg

@@ -124,14 +124,14 @@ hexagonit.recipe.cmmi = 1.6
 lxml = 3.0alpha2
 meld3 = 0.6.9
 netaddr = 0.7.10
-slapos.core = 0.28.7
+slapos.core = 0.28.8
 slapos.libnetworkcache = 0.13.2
 xml-marshaller = 0.9.7
 z3c.recipe.scripts = 1.0.1
 zc.recipe.egg = 1.3.2
 
 # Required by:
-# slapos.core==0.28.7
+# slapos.core==0.28.8
 Flask = 0.9
 
 # Required by:
@@ -139,11 +139,11 @@ Flask = 0.9
 hexagonit.recipe.download = 1.5.1
 
 # Required by:
-# slapos.core==0.28.7
+# slapos.core==0.28.8
 netifaces = 0.8
 
 # Required by:
-# slapos.core==0.28.7
+# slapos.core==0.28.8
 # slapos.libnetworkcache==0.13.2
 # supervisor==3.0b1
 # zc.buildout==1.6.0-dev-SlapOS-006
@@ -151,9 +151,9 @@ netifaces = 0.8
 setuptools = 0.6c12dev-r88846
 
 # Required by:
-# slapos.core==0.28.7
+# slapos.core==0.28.8
 supervisor = 3.0b1
 
 # Required by:
-# slapos.core==0.28.7
+# slapos.core==0.28.8
 zope.interface = 4.0.1