Better mutex enforcement between cert verification flags && memstore

[epociask]

Problem
Currently, the cert verification fields (i.e, SERVICE_MANAGER_ADDRESS, ETH_RPC) are required for propagation to the eigenda client. However, they shouldn't need to be enabled when using memstore or disabling cert verification mode. #205 provides a bandaid but is a logical regression to the core abstractions of proxy.

Proposed Solution
Investigate more graceful solution routes; e.g: different flag types, etc.