fix failed nodes

[polefishu]

remove node that still known by some redis node but which doesn't exists anymore meaning it is failed, and pod not in kubernetes, or without targetable IP.

eg:

9f022683ce0648d2ece63f8228c841af9cf17f32 10.25.245.155:6379@16379 master,fail - 1571727438167 1571727435000 7 connected 10240-12287
21f9762f617fa7015eabc93f5a4f572dd10984d0 10.25.42.216:6379@16379 master,fail - 1571727438570 1571727433000 10 connected 956-1365 4916-5461 9012-9557 13108-13653
3ef0fe113df780567435bcc260ec11e6d99a0889 10.25.131.198:6379@16379 master,fail - 1571727438671 1571727435000 21 connected 4508-4915 8192-9011 12288-13107
b31fa1fc343a2e35454879fbd7766a05ed737595 10.25.148.113:6379@16379 master - 0 1571727891672 23 connected
19d921e27cf9310466fa47dd878d897cd60abe36 10.25.158.242:6379@16379 slave,fail 32bd732c4e64131c40d97699acb2b67857d5e154 1571727417746 1571727411000 15 connected
c99cf754651352d3924c11535aea5dbff897d035 10.25.102.60:6379@16379 slave,fail 9f022683ce0648d2ece63f8228c841af9cf17f32 1571727418046 1571727412936 7 connected
0545c6aa7be1edac7699dafcac8e74ae42a27fe9 10.25.155.37:6379@16379 master - 0 1571727896686 18 connected
914f4a8913c98e2109ba7e52d74c05d605ef746b 10.25.179.30:6379@16379 myself,master - 0 1571727881000 1 connected
9ae71d8f27b1fb549b91a84bc99e1b7018344b92 10.25.15.34:6379@16379 slave,fail 3ef0fe113df780567435bcc260ec11e6d99a0889 1571727438369 1571727435058 21 connected
316bb73f32ca8c9145636f75793d356766fe33b4 10.25.25.24:6379@16379 master,fail - 1571727438470 1571727432000 6 connected 2048-4095
c683896392e38c65597840ab4a92198b1abfc8d6 10.25.44.46:6379@16379 master - 0 1571727897000 0 connected
664f54e000664947fb8d0db1fe65f4e321b7dd7e 10.25.202.241:6379@16379 master,fail - 1571727438671 1571727437566 16 connected 1366-2047 4506-4507 5462-6143 9558-10239
116650d29e02ccbc31dc66ab628bc55a7f96adeb 10.25.188.223:6379@16379 slave,fail e1449e08e4b4fe086478ea505be8a322b977707c 1571727418249 1571727416000 13 connected
e1449e08e4b4fe086478ea505be8a322b977707c 10.25.9.93:6379@16379 master,fail - 1571727438671 1571727432048 13 connected 14336-16383
fc87c2ddb5df7947dbc17fae11745610dedeabd4 10.25.188.250:6379@16379 slave,fail 664f54e000664947fb8d0db1fe65f4e321b7dd7e 1571727418148 1571727413000 16 connected
2ff1b5f51c760b098e6841c5bbad96a27c2dee87 10.25.96.66:6379@16379 slave,fail 72e0dd24c9a8b316d84fd7e0e5f6c2d9013f495a 1571727417946 1571727416544 2 connected
32bd732c4e64131c40d97699acb2b67857d5e154 10.25.43.116:6379@16379 master,fail - 1571727437866 1571727437065 15 connected 0-955 4096-4505 13654-14335
3a60d6efef2b7926da156366ede8a390f56d786a 10.25.18.171:6379@16379 master - 0 1571727898191 17 connected
6970871b843c542292633a1271edc81320bd50bc 10.25.3.46:6379@16379 master - 0 1571727898692 22 connected
3f04760c7f9d1c5b2274cbf35de52d66f500e99d 10.25.222.230:6379@16379 master - 0 1571727894680 19 connected
8c39a041fc77318e8b96920f976cfc9649a2070d 10.25.193.225:6379@16379 master - 0 1571727898000 20 connected
72e0dd24c9a8b316d84fd7e0e5f6c2d9013f495a 10.25.174.2:6379@16379 master,fail - 1571727438369 1571727435000 2 connected 6144-8191
cf95d11b5990fe1969bab7c35ca01dcbb7d9e2c2 10.25.86.64:6379@16379 slave,fail 21f9762f617fa7015eabc93f5a4f572dd10984d0 1571727418451 1571727417545 10 connected
6b62334219867fc925ddf3e238eb0951678b2583 10.25.198.105:6379@16379 slave,fail 316bb73f32ca8c9145636f75793d356766fe33b4 1571727417946 1571727413000 6 connected