Reduce test time of 2 testcases

[melroy89]

The following two test cases take up 99% of the execution time:

• test_dht
• test_name

Which won't help short development cycles in a DevOps cycle and fast CI/CD.

Let's see if we can make the two mentioned testcases faster.

Console output:

 3/10 Test #63: test_dht .........................      Passed  104.44 sec
 7/10 Test #67: test_name ........................   Passed   80.46 sec

Regards,

Melroy van den Berg

[melroy89]

The bad weather test was out-dated with IPFS v0.20.0, thus removed. Which already helped quite a lot with the test_dht test