change prokka defualt url

src/config.imp.json

@@ -61,7 +61,7 @@
         ]
     },
     "prokka": {
-        "pkg_url": "http://www.vicbioinformatics.com/prokka-1.11.tar.gz",
+        "pkg_url": "https://webdav-r3lab.uni.lu/public/R3lab/IMP/prokka-1.11.tar.gz",
         "databases": [
             "cm/Bacteria.i1i",
             "genus/Staphylococcus.phr",