BaseTools: Remove the deprecated hash_key()

Replace "has_key()" with "in" to be compatible with python3.
Based on "futurize -f lib2to3.fixes.fix_has_key"

Contributed-under: TianoCore Contribution Agreement 1.1
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>

BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/ini.py

@@ -140,7 +140,7 @@ class BaseINIFile(object):
                     sObj = self.GetSectionInstance(self, name, (len(sname_arr) > 1))
                     sObj._start = index
                     sObjs.append(sObj)
-                    if not self._sections.has_key(name.lower()):
+                    if name.lower() not in self._sections:
                         self._sections[name.lower()] = [sObj]
                     else:
                         self._sections[name.lower()].append(sObj)