Restored gcc49 as default compiler for slc6

LbConfiguration/python/LbConfiguration/Platform.py

@@ -324,7 +324,7 @@ flavor_runtime_equivalence = {
 
 supported_compilers = {
                        "centos7"   : ["gcc62", "gcc49", "gcc48"],
-                       "slc6"   : ["gcc62", "gcc49", "gcc48", "gcc46","gcc45", "gcc44", "gcc47", "icc11", "icc13",
+                       "slc6"   : ["gcc49", "gcc62", "gcc48", "gcc46","gcc45", "gcc44", "gcc47", "icc11", "icc13",
                                    "clang32", "clang34", "clang35", "clang37", "gcc50", "icc17"],
                        "slc5"   : ["gcc46", "gcc43", "gcc45", "icc11"] ,
                        "slc4"   : ["gcc34"],