data_smart: Default to expansion for getVar/getVarFlags

We've been building to this for a while, default to return expanded values for getVar/getVarFlags.

We can then go through and remove the "True" option to many of the calls to this function, all function calls should have a default by now though since the parameter has been required for a while.

index 67c0248..49223a4 100644
@@ -565,7 +565,7 @@ class DataSmart(MutableMapping):

                 if len(shortvar) == 0:
                     override = None

-    def getVar(self, var, expand, noweakdefault=False, parsing=False):
+    def getVar(self, var, expand=True, noweakdefault=False, parsing=False):
         return self.getVarFlag(var, "_content", expand, noweakdefault, parsing)
     def renameVar(self, key, newkey, **loginfo):
@@ -662,7 +662,7 @@ class DataSmart(MutableMapping):
                 self.dict["__exportlist"]["_content"] = set() self.dict["__exportlist"]["_content"].add(var)

-    def getVarFlag(self, var, flag, expand, noweakdefault=False, parsing=False):
+    def getVarFlag(self, var, flag, expand=True, noweakdefault=False, parsing=False):
         local_var = self._findVar(var)
         value = None
         if flag == "_content" and var in self.overridedata and not parsing: