fix(test-tooling): use of hardcoded password

Primary Changes
----------------
1. BREAKING CHANGE: "password" is now a mandatory parameter of the newEthPersonalAccount function
defined in openethereum-test-ledger.ts. It was previously optional.
2. Updated line 236 in openethereum-test-ledger.ts so the default password argument to the
newEthPersonalAccount function is not hardcoded.

Fixes #2766

Signed-off-by: ashnashahgrover <[email protected]>

Author: ashnashahgrover

packages/cactus-test-tooling/src/main/typescript/openethereum/openethereum-test-ledger.ts

@@ -233,7 +233,7 @@ export class OpenEthereumTestLedger {
    */
   public async newEthPersonalAccount(
     seedMoney = 10e8,
-    password = "test",
+    password: string,
   ): Promise<string> {
     const account = await this.web3.eth.personal.newAccount(password);