Session operations for deployments

There have been added new operations for sessions in wildfly deployments. We should probably provide such ability also in our web-console.

The lisf of operations is listed in https://github.com/wildfly/wildfly-proposals/blob/master/undertow/EAP7-858_Session_Manager_Operations.adoc

They are

The extra operations implemented will be:

invalidate-session(sessionId)

Invalidates the provided session id

list-sessions()

Lists all session id’s

list-session-attribute-names(sessionId)

Lists all attribute names for the given session

list-session-attributes(sessionId)

Returns an object that maps attribute names to an attributes string representation

get-session-attribute(sessionId, attributeName)

Returns the string representation of the given attribute

get-session-last-accessed-time

Gets the session last accessed time in ISO-8601 format

get-session-last-accessed-time-millis

Gets the session last accessed time in milliseconds since unix epoch

get-session-creation-time

Gets the session creation time in ISO-8601 format

get-session-creation-time-millis

Gets the session creation time in milliseconds since unix epoch