Add full text search to bcdb

[andrewayoub]

when you add *** to a field in the schema this should index this field in sonic server so you can perform full text search on it

[john-kheir]

Verifications Steps: 1- Create data and schema

 data = [ {"name": "test1", "content": "lorem epsum"} ]

 schema = """
 @url = test.docsites
 name* = (S)
 content*** = (S)
    """

2- Get model

 bcdb = j.data.bcdb.get("test")
 bcdb.reset()
 model = bcdb.model_get_from_schema(schema)

3- Save the data

 for obj in data:
     o = model.new()
     o.name = obj["name"]
     o.content = obj["content"]
     o.save()

4- Search for the data ad assert

 res = model.search("lorem")
 assert res[0].name == "test1"

Commit: https://github.com/threefoldtech/jumpscaleX/commit/ec950fb84c81bcdb372e9ad880f9 branch: development_jumpscale