This improves error reporting if `JSONRPCException` is not specifically caught
and ends up in Python's default backtrace handler.
Before:
```
Traceback (most recent call last):
File "/.../projects/bitcoin/bitcoin/qa/rpc-tests/test_framework/authproxy.py", line 153, in __call__
raise JSONRPCException(response['error'])
test_framework.authproxy.JSONRPCException
```
After:
```
Traceback (most recent call last):
File "/.../projects/bitcoin/bitcoin/qa/rpc-tests/test_framework/authproxy.py", line 152, in __call__
raise JSONRPCException(response['error'])
test_framework.authproxy.JSONRPCException: Unknown named parameter random (-8)
```
Python lambda use was incorrect.
sendcmpct messages need to be synchronized with RPC calls to generate().
Headers need to be synced (eg with getheaders) for cmpctblock announcements
to start.
Last test omitted sending a sendcmpct message.
waitfornewblock waits until a new block is received, or the timeout expires, then
returns the current block height/hash.
waitforblock waits for a specific blockhash, or until the timeout expires, then
returns the current block height/hash. If the target blockhash is the current
tip, it will return immediately.
waitforblockheight waits until the tip has reached a certain height or higher,
then returns the current height and hash.
waitforblockheight is used to avoid polling in the rpc tests.
Forward-ports two commits from 0.13:
- [0.13] Create a new HD seed after encrypting the wallet
- [Wallet] Add CKeyMetadata record for HDMasterKey(s), factor out HD key generation
Github-Pull: #8389
Rebased-From: f142c11ac6de45c065f0
Wladimir J. van der Laan