Added support for token based authentication supported via a plugin mechanism.

Conflicts:
	core/src/main/java/com/orientechnologies/orient/core/db/ODatabase.java
	core/src/main/java/com/orientechnologies/orient/core/db/raw/ODatabaseRaw.java
	core/src/main/java/com/orientechnologies/orient/core/db/record/ODatabaseRecordAbstract.java
	core/src/main/java/com/orientechnologies/orient/core/metadata/security/OSecurityNull.java
	core/src/main/java/com/orientechnologies/orient/core/metadata/security/OSecurityProxy.java
	core/src/main/java/com/orientechnologies/orient/core/metadata/security/OSecurityShared.java
	object/src/main/java/com/orientechnologies/orient/object/db/OObjectDatabaseTx.java
	server/src/main/java/com/orientechnologies/orient/server/OServer.java
	server/src/main/java/com/orientechnologies/orient/server/network/protocol/http/OHttpRequest.java
	server/src/main/java/com/orientechnologies/orient/server/network/protocol/http/OHttpUtils.java
	server/src/main/java/com/orientechnologies/orient/server/network/protocol/http/ONetworkProtocolHttpAbstract.java
	server/src/main/java/com/orientechnologies/orient/server/network/protocol/http/command/OServerCommandAuthenticatedDbAbstract.java
Added support for token based authentication supported via a plugin mechanism.
updated to the last version of the user managment, fixed some java8 dependency
reformated jwt source code with the orient formatter