xml file is invalid - ce 1.9.3.3 to ce 2.1.7

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Whenever add version in **/vendor/module/data-migration-tool/etc/ce-to-ce/1.9.3.3/config.xml** `` and ``, it throws error like xml file is invalid

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We have validated **config.xml** with **config.xsd** by online xml validation tool, it also report the same error.

I have attached the error report below

3 errors have been found!

Errors in the XML document:

**Error 1**
100:
31
cvc-complex-type.3.2.2: Attribute 'version' is not allowed to appear in element 'source'.

**Error 2**
103:
34
cvc-complex-type.3.2.2: Attribute 'version' is not allowed to appear in element 'destination'.

**Error 3**
111:
42
InvalidRegex: Pattern value '[-/A-Za-z0-9\._]+\.(xml|dist)' is not a valid regular expression. The reported error was: ''-' is an invalid character range. Write '\-'.'.

Start with vendor/module/data-migration-tool/etc/ce-to-ce/1.9.3.3/config.xml and compare its source and destination elements with config.xsd. Reproduce the reported validation errors, then confirm the XML schema accepts the version attributes and the file-pattern regular expression without introducing new validation errors.

Written by the indexing model from the issue text.