Adjust max steps count or remove it

[lixingwang]

Current behavior (how does the issue manifest):
Today we have a max step count set to 1000000. We running into the issue today that one of the app reached the size.
Expected behavior:

Should we consider to remove the max count limit or set another bigger value?

@fm-tibco Any ideas? Why we have this limitation from the beginning?

Minimal steps to reproduce the problem (not required if feature enhancement):

Please tell us about your environment (Operating system, docker version, browser & web ui version, etc):

Flogo version (CLI & contrib/lib. If unknown, leave empty or state unknown): 0.X.X

Additional information you deem important (e.g. issue happens only occasionally):

[fm-tibco]

I worry about flows that have more than a million activity instances. But the main reason to have the limit is to reduce the impact of possible infinite loops.