JCRVLT-28 Improve package import for subtrees

- fix minor error when root node is already new. this only happens with relative imports

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/commons/filevault/trunk@1569157 13f79535-47bb-0310-9956-ffa450edef68
JCRVLT-31 Packages defined by a stream are copied to a file first

- create memory archive and is fed when the package is uploaded
- also use memory archive if package size is < 1mb.

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/commons/filevault/trunk@1569161 13f79535-47bb-0310-9956-ffa450edef68
JCRVLT-30 Allow package definition to specify recursive install behavior

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/commons/filevault/trunk@1569209 13f79535-47bb-0310-9956-ffa450edef68
JCRVLT-30 Allow package definition to specify recursive install behavior

- adding 1 more test

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/commons/filevault/trunk@1569212 13f79535-47bb-0310-9956-ffa450edef68