Several pom.xml files are invalid according to Maven POM XSD

Maven repository validation for RHPAM/RHDM product which started to use org.apache.tomcat:tomcat-dbcp:9.0.7.redhat-12 found that the following pom.xml files are invalid according to Maven POM XSD [1]:

• org.apache.tomcat:tomcat-dbcp
• org.apache.tomcat:tomcat-juli

The validation error is the following:

Error - Line 18, 10: org.xml.sax.SAXParseException; lineNumber: 18; columnNumber: 10; cvc-elt.1.a: Cannot find the declaration of element 'project'.

It seems that the POM files do not use the namespace http://maven.apache.org/POM/4.0.0 as expected by Maven POM XSD.

An example of the validation error can be found at [2].

[1] http://maven.apache.org/xsd/maven-4.0.0.xsd
[2] http://www.utilities-online.info/xsdvalidation/?save=ce945482-7a29-482a-bb6b-401aac1bb117-xsdvalidation