Left over property index

[henning-gerhardt]

Description
If you create a new elastic search mapping then a index called "property" is created too but get not populated with data as the former content of the properties are now stored inside the "process" index.

Way to reproduce

• Delete old mapping
• Create a new mapping
• Do some indexing of data
• index "property" did not get any data

Goal

• Do not create this index if this index is not needed and used
• Remove the property.json file from the repository if this file is not needed anymore.