…tworkinfo`

1d524c6 tests: rename 'test_getnetworkinginfo' in 'test_getnetworkinfo' (darosior)
07a8f65 tests: add a test for the 'servicesnames' RPC field (darosior)

Pull request description:

  As per #16787 (comment), fixes #16844.

  This adds a test for both commands in the first commit and renames the test for `getnetworkinfo` in the second commit.

ACKs for top commit:
  laanwj:
    ACK 1d524c6

Tree-SHA512: 8267dce4d54356debab75014e6f9ba885b892da605ed32f26a5446c232992fcae761861bb678adbdb942815d4706f3768c70deee6afec68f219b23605475be01

In getpeerinfo and getnetworkinfo

Github-Pull: bitcoin#16850
Rebased-From: 07a8f65

Summary:
This adds a test for both commands in the first commit and renames the test for getnetworkinfo.
Depends on D7948

This is a backport of Core [[bitcoin/bitcoin#16850 | PR16850]]

Test Plan: `ninja && test/functional/test_runner.py rpc_net.py`

Reviewers: O1 Bitcoin ABC, #bitcoin_abc, Fabien

Reviewed By: O1 Bitcoin ABC, #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D7949

Summary:
The tests added in [[bitcoin/bitcoin#16850 | PR16850]] assumed that the field `localservices` returned by `getnetworkinfo` was a string representation of an integer, when it is really a string representation of a hex. This fixes the test to decode the field properly and do the correct bitwise comparisons.

This is a backport of Core [[bitcoin/bitcoin#16991 | PR16991]]

Test Plan:
`ninja && ./test/functional/test_runner.py rpc_net.py`

```
$ bitcoin-cli getnetworkinfo
...
 "localservices": "0000000000000425",
  "localservicesnames": [
    "NETWORK",
    "BLOOM",
    "BITCOIN_CASH",
    "NETWORK_LIMITED"
  ],
...

$ python
>>> int("425", 16)
1061
>>> NODE_NETWORK = (1 << 0)
>>> NODE_BLOOM = (1 << 2)
>>> NODE_BITCOIN_CASH = (1 << 5)
>>> NODE_NETWORK_LIMITED = (1 << 10)
>>> NODE_NETWORK | NODE_BLOOM | NODE_BITCOIN_CASH | NODE_NETWORK_LIMITED
1061
>>>

```

Reviewers: O1 Bitcoin ABC, #bitcoin_abc, deadalnix, Fabien

Reviewed By: O1 Bitcoin ABC, #bitcoin_abc, deadalnix, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D8083

…kinfo