Build 5.6.0-SNAPSHOT on jenkins and prepare for 5.6.0.Final release

Requirements:

1) All repositories in the 5.6.x repository-list need to be branched from 5.5.x.
https://github.com/droolsjbpm/droolsjbpm-build-bootstrap/blob/5.6.x/script/repository-list.txt
Note: the repository list is far less than master (so you can safely ignore uberfire etc).
Warning 1: some repo's are already branched! Do not rebranch these: droolsjbpm-build-bootstrap, droolsjbpm-knowledge, drools
Warning 2: You need to branch from 5.5.x (NOT master!) to this new branch 5.6.x
Warning 3: jbpm uses different version numbering. You need to branch from jbpm 5.4.x to 5.5.x (NOT 5.6.x). All other repo's use the normal version.

2) All the 5.6.x branches (and 5.5.x for jbpm)'s versions need to change from 5.5.1-SNAPSHOT to 5.6.0-SNAPSHOT (and from 5.4.0-SNAPSHOT to 5.5.0-SNAPSHOT for jbpm).
Note: droolsjbpm-tools's will need changes from 5.5.1.qualifier to 5.6.0.qualifier

3) Create a new jenkins view for "drools 5.6.x and jbpm 5.5.x"

4) Clone the 5.5.x jobs for all these repo's as 5.6.x jobs.