Allow creating a CollaboratingWorkbooksEnvironment from a Map too, not only a pair of arrays

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1612218 13f79535-47bb-0310-9956-ffa450edef68
Fix inconsistent whitespace

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1612219 13f79535-47bb-0310-9956-ffa450edef68