Wrote new end2end test for agent regeneration.
Revert "Wrote new end2end test for agent regeneration."

This reverts commit 9924cd916b15cdfb8e3a9446472a3744805d148a.
Extracted some fields for TestExperiment.
Wrote new end2end test with AgentGenerator in agent container.
Added regenerating feature to StaticallyPairingAgentContainer.