enhance happi-graph to take tex content

[davidradl]

The components tex being implemented in this issue odpi/egeria-ui-components#245 will drive a new happi-graph graph type called tex.

• Add new types of entity inheritance graph TEX-ENTITY-TYPE-INHERITANCE
• Add new types of entity inheritance graph TEX- ENTITY-TYPE-CENTRIC
• Implement separate addNodes AddEdges for TEX-ENTITY-TYPE-INHERITANCE
• Implement separate addNodes AddEdges for TEX- ENTITY-TYPE-CENTRIC
• Test with mocked data

[davidradl]

@sarbull do the above tasks make sense - did I miss anything?

[sarbull]

If we discuss graphType, yes, there should be two, the default "tex tree view" and the "neighbourhood view" that will be used in egeria-ui-components for tex component implementation.

The data structure should change and adapted for the AddNodes and AddEdges implementation or viceversa.

[habiblawal1]

I can take this up David :)