Add multi instance support, refactoring service.pp (4/x)

[SimonHoenscheid]

This commit adds changes a class to add multi instance support to this module. The general idea is to first copy all classes which are used and create defines from them. These classes will use the defines as is. Necessary changes for the instances itself will be added to the classes and defined types at a later point. This ensures, the module will work as it does right now and there are no breaking changes.

[puppet-community-rangefinder]

postgresql::server::instance_service is a type

that may have no external impact to Forge modules.

postgresql::server::service is a class

that may have no external impact to Forge modules.

This module is declared in 70 of 580 indexed public Puppetfiles.

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Exact matches are those that we can positively identify via namespace and the declaring modules' metadata. Non-namespaced items, such as Puppet 3.x functions, will always be reported as near matches only.