No longer validate the test or export aggregates using metadatatool.

This means that we are no longer validating them for Shibboleth 1.3 IdP compatibility, primarily around the limit to the number of namespaces which can be in scope at one time. This allows us to relax that constraint for the test and export aggregates.
Hoist saml, mdattr and alg namespace prefixes in export aggregate.
Add an echoproperties target to help in debugging the Windows version.
Set explicit encoding in fixcrlf so that we're not dependent on the system default encoding.

The system default encoding is variable, particularly on Windows, and using it for fixcrlf can cause corruption of UTF-8 multi-byte character encodings.
Temporarily revert rev 13041 until MPS is compatible.
Cope with future name change to Dom(DOM)DocumentFactoryBean.
Use /usr/bin/env to find perl so that we always get the default one.