meta-phosphor: image: update ConfigParser class name

As a follow up to 400d9dab03e25d992429f94296caa4938c281fbd, fix the
deprecated SafeConfigParser to ConfigParser across the tree.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Iabf941889eed97a996b739d77c8107f1f35ce5bf
diff --git a/meta-phosphor/classes/image_version.bbclass b/meta-phosphor/classes/image_version.bbclass
index 56ebe66..bf3ca93 100644
--- a/meta-phosphor/classes/image_version.bbclass
+++ b/meta-phosphor/classes/image_version.bbclass
@@ -7,7 +7,7 @@
     import io
     path = d.getVar('STAGING_DIR_TARGET', True) + d.getVar('sysconfdir', True)
     path = os.path.join(path, 'os-release')
-    parser = configparser.SafeConfigParser(strict=False)
+    parser = configparser.ConfigParser(strict=False)
     parser.optionxform = str
     version = ''
     try: