Remove overload-based nesting from test suites

[ItsNickBarry]

Overloaded functions should be treated as separate for the purposes of testing. Non-overloaded functions should also include the full function signature in the test suite description. The following is an example of the requested change from MinimalProxyFactory.ts.

Before:

describe('#_deployMinimalProxy', function () {
  describe('(address)', function () {
    // ...
  });

  describe('(address,bytes32)', function () {
    // ...
  });
});

describe('#_calculateMinimalProxyDeploymentAddress', function () {
  // ...
});

After:

describe('#_deployMinimalProxy(address)', function () {
  // ...
});

describe('#_deployMinimalProxy(address,bytes32)', function () {
  // ...
});

describe('#_calculateMinimalProxyDeploymentAddress(address,bytes32)', function () {
  // ...
});