Fix several issues with the schema, aligning it with actual output generated by StatusTransformer class.
1. Add memorypool element to status.xsd schema.
2. There is no minSpareThreads attribute on threadInfo. Removed it from xsl file as well.
3. There can be 0..many workers
4. There can be 1..many connectors

To test, one can save output of /manager/status?XML=true command and
add the following attributes to the root <status> element:
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="status.xsd"

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1453112 13f79535-47bb-0310-9956-ffa450edef68