[ware]Pass only isAdmin flag to CallContext

A whole User object is not required.
[ware]Avoid an error when folderId is null at getCheckOutDocs

Until now, the root folder is happened to be returned when folderId is
null. This depends on the implementation.
[ware]Output a correct error message at checkAddProperty
[ware]Change changeToken type from long to String

changeToken value is still sequential number, but its type is now
String. This is for another back end that doesn't use numeric
changeToken.
[ware]Improve IN_TREE query performance

In place of recursive calling, call Solr two times by seeing the path
field.
[ware]Set node type in model constructor
[ware]Change the package of DebugInterceptor
[ware]Change type from long to Long in NemakiPropertyDefinition
[ware]Remove getDescendants method from ContentService

This method was used only for deleteTree. I changed the way of getting
failure data in deleteTree.
[ware]Externalized CMIS base types attributes setting
[ware]Change long type to Long

I've forgotten to change it.
[ware]Avoid null error when there is no changeToken in the repository
[ware]Remove RepositoryResourceService

This is deprecated will be unused for the moment.
[ware]Make REST API switchable
[ware]Delete stale unit tests
[ware]Remove unnecessary code
[ware]Remove unnecessary code
[all]Arrange .gitignore(get toghether .classpath and .project)
[installer]Specify Java1.6 in maven compiler
[installer]Delete eclipse setting from install-util