Update initCache and clearCache to account for multi-threaded case.
Essentially, one thread could change the static 'resolvedSchema' variable from
null to non-null after another thread found the value to be null. 

Contributor: Jeff Barrett via Roy Wood
                                             

git-svn-id: https://svn.apache.org/repos/asf/webservices/commons/trunk/modules/XmlSchema@757453 13f79535-47bb-0310-9956-ffa450edef68
2 files changed
tree: 19b9ab32039a70cfe07dfadf4cf62effe6059b87
  1. etc/
  2. maint/
  3. src/
  4. pom.xml
  5. README.txt
  6. RELEASE-NOTE.txt