Refactored the ServiceSnapshotFactoryBean class to handle ZIP and JAR files as input sources on GemFire Cache data imports. Added additional unit tests for SnapshotServiceFactoryBean to improve coverage along with a basic integration test covering import and export. Fixed bugs in the SnapshotServiceParser and the XSD. Moved the iterable(:Enumeration) and iterable(:Iterator) methods from the test CollectionUtils class to the 'official' CollectionUtils class. (cherry picked from commit b47884c88c52b612aff6b8aa01fc0994ac42095c) Signed-off-by: John Blum <jblum@pivotal.io>