version 2.0.55 - bugfix for type=diff argument "filter=xyz" | type=[UTIL]-merger - introduction of dupalgoritm=identical for all util mergers

[swaschkut]

Description

UTIL:

• type=addressgroup-/servicegroup-/service-merger | introduce dupalgorithm=identical
• type=servicegroup-merger | introduce childDG validation
• type=addressgroup-/servicegroup-/merger - for childDG object move; correct hashmap object array of actual DG

BUGFIX:

• type=diff "filter=XPATH" | bugfix as filter was not used
• type=UTIL-merger | fix for Buckbeak validation

GENERAL:

• extend different Fawkes and Buckbeak related classes
• improve bash completion script
• class TemplateStack | introduce method setName()
• class PanoramaConf | introduce method removeTemplateStack - improve removeDeviceGroup and removeTemplate
• class MERGER | method servicegroup_merger - correct variable name
• test script optimisation - MERGER output adjustment