OCP4: use utf-8 as default xml encoding

This commit make UTF-8 as default xml encoding. In a recent change, when writing xccdf xml file, it uses the output encoding US-ASCII as default if not set, however this causes issues in Compliance Operator parser, using US-ASCII, the parser is not able to get the prefix of xml node, therefore crash the parser pod.

build-scripts/build_xccdf.py

@@ -97,7 +97,7 @@ def link_benchmark(loader, xccdftree, args, benchmark=None):
     if ocil is not None:
         link_ocil(xccdftree, checks, args.ocil, ocil)
 
-    ssg.xml.ElementTree.ElementTree(xccdftree).write(args.xccdf)
+    ssg.xml.ElementTree.ElementTree(xccdftree).write(args.xccdf, encoding="utf-8")
 
 
 def get_path(path, file_name):

build-scripts/compose_ds.py

@@ -282,10 +282,10 @@ def upgrade_ds_to_scap_13(ds):
 
 def _store_ds(ds, output_13, output_12):
     if output_12:
-        ds.write(output_12, xml_declaration=True)
+        ds.write(output_12, xml_declaration=True, encoding="utf-8")
 
     ds_13 = upgrade_ds_to_scap_13(ds)
-    ds_13.write(output_13, xml_declaration=True)
+    ds_13.write(output_13, xml_declaration=True, encoding="utf-8")
 
 
 def append_id_to_file_name(path, id_):

ssg/build_yaml.py

@@ -426,7 +426,7 @@ def to_xml_element(self, env_yaml=None, product_cpes=None):
     def to_file(self, file_name, env_yaml=None):
         root = self.to_xml_element(env_yaml)
         tree = ET.ElementTree(root)
-        tree.write(file_name)
+        tree.write(file_name, encoding="utf-8")
 
     def add_value(self, value):
         if value is None:
@@ -1590,7 +1590,7 @@ def export_ocil_to_file(self, filename):
         if root is None:
             return
         tree = ET.ElementTree(root)
-        tree.write(filename, xml_declaration=True)
+        tree.write(filename, encoding="utf-8", xml_declaration=True)
 
 
 class Platform(XCCDFEntity):