GTNPORTAL-3450: Impossible to upload file in Content Explorer when tmpdir does not exist

Fix description:
- When uploading a file, check if tmpdir exists. If not, create it
GTNPORTAL-3500 Remove the unreality testcase in multi-threading
Picketlink IDM upgrade to 1.4.5.Final . Minor changes in some comments
Upgrade Shindig to version 2.0.2.Final-gatein-5
GTNPORTAL-3503 Define a default order for page management results
GTNPORTAL-3505 - Adjusted the XSL transformation to set wsdl-host to jbossws.undefined.host
GTNPORTAL-3494 Fix for side effect in App Registry import-all
GTNPORTAL-3509 Missing validator when importing applications
GTNPORTAL-3506 Allow multiple apps registering the very same AMD paths
GTNPORTAL-3510 Possible memory leaks, consistency issues and concurrency
issues in ScriptGraph
Minor performance enhancement in JavascriptConfigService
GTNPORTAL-3502 Tests for GateInResourcesDeployer
GTNPORTAL-3513 Layout of portlet is broken in preview mode using extensions
GTNPORTAL-3489 MembershipDAOImpl]ORA-00001: unique constraint (IDM.SYS_C0015551) violated
GTNPORTAL-3365 A small fix for popup message
GTNPORTAL-3502 Added a GateInResourcesDeployer test scenario with a
repeated add and remove using interdependent apps
GTNPORTAL-3514 Fix NotSerializableExceptions in OrganizationPortlet components
[maven-release-plugin] prepare release 3.8.3.Final
[maven-release-plugin] prepare for next development iteration
GTNPORTAL-3516 NotSerializableException: org.exoplatform.services.organization.impl.UserImpl
Revert 6e06d62e68e21d5bae5323258df13d2bc3d6c6b2 GTNPORTAL-3482 Deprecated class of UserImpl