used wireguard port are not properly reported on testnet

[zaibon]

for n in nodes: 
   2     print(n.node_id, n.wg_ports)                                                                                                                                                                     
2fi9ZZiBGW4G9pnrN656bMfW6x55RSoHDeMrd9pgSA8T []
72CP8QPhMSpF7MbSvNR1TYZFbTnbRiuyvq5xwcoRNAib []
D1sY7tgHX6fVvjrpCotr4SmezVyRShLTufqhEpBQxK1v []
6m9gFPTYLRiCH7FD8yU5VWwXZdfegKUvXZgrJoS1EJfQ []
2m3nHPSAMyZFSeg5HPozic2NGBMtrXrBkhtNcVmd5Ss6 []
3dAnxcykEDgKVQdTRKmktggL2MZbm3CPSdS9Tdoy4HAF []
3BwDVNRigau8Zk6BQkJt5PLxrHQnJ5NTfNvAtuubC1eS []
A7FmQZ72h7FzjkJMGXmzLDFyfyxzitDZYuernGG97nv7 []
7fHSAHEvUGtUcYSqLtpGq8ANssPikTyyHC52FddDYF4Y []
FjwyHVvfATkVb4Puh4x6jCMS79TVVgSYagAuZTxWrsbj []
HT9yNvHRQs65dyRJeztAdEnXKweCX2bhgvD9i1WFPUNs - 1,000

9211BFV7MFwktD2b8jHE9Ub3fHRtaYQyBBfwT9kEKA7q []
HugtVL51BFNLbZbbxnWu2GEe8hV97YVPac19zy5wwNpT []
9KAbX21NGbZYupBJ6EeeWx3ZTKDx7ADevr8qtmEa5WkC []
9kcLeTuseybGHGWw2YXvdu4kk2jZzyZCaCHV9t6Axqqx []
3h4TKp11bNWjb2UemgrVwayuPnYcs2M1bccXvi3jPR2Y []
FUq4Sz7CdafZYV2qJmTe3Rs4U4fxtJFcnV6mPNgGbmRg []
5Pb5NMBQWLTWhXK2cCM8nS6JZrnP2HaTP452TfMMYT9p []
DUF2knurdMuX2eJVp9o7tXq4eNBy2fbxBoWhrMXWPEtF []
8zdqjFD7GLsSSfsTgFYcGusw91gQ3tdx7jbUhJep2a5X []
6chi1iSczxfF4U2iyCcJwkwWnwzcDgQHzCRExK9r4V1j []
AT4hKXnFWPNsnE38sUoERDVzxL9mNysqDWQSdHkum7YD - 8,192

J1Xb2piba1vZM2pSmWP24CPgREnoTce7EuUJysttCyz6 - 8,193
- 8,194
- 1,000

9161hj9VnM41HVvTr7nHQKcgFBx8Yf6AjWduMCrBXQip - 8,193
- 8,194
- 1,000

33zKcb6YBSuYDVrTsm6AjBuTpujP4na7kL6ZrShcVKbF - 8,194
- 1,000
- 8,193

FLeByELHK22evRYqJokHsCMCF9wQpLtuyehUp1LgR5eM []
49RnnxyRJ7r2So6UMBV2UDyLtoyRjmAf8NEnDnzpMtmY []
ByTfXHH7RogHNLpTpBWbn34ofC2tfCBVhFKJxYnMBoNi []
A34YUGenHKyhjDMAUKZe4cVDtJM2wQ4n4XRkfGUUEYdy - 1,000
- 8,192

HYwvrxCy5z1QPALC5gTAiAMYWLH7orQ8xWEDbEyLiJV7 - 8,192
- 1,000

CBDY1Fu4CuxGpdU3zLL9QT5DGaRkxjpuJmzV6V5CBWg4 - 8,192
- 1,000

Hb6oVe2B5v9UBzDcDeQfZGn5bwFeM2R3rJh6U93AWfiN - 8,192
- 1,000

54S1qFXxWgnjmvEFVvqUbR7dHhvCshLbQrp2UpmE7GhZ - 8,192
- 1,000

9WhwSbM2xBNb9E3ws3PNJfyeajnKXWDZAMBLZMXCA9jf - 8,192
- 1,000

2hgRioV9ZKe8Apnm84TZn8Bn5XczyPU2nkPmozUY4rYw - 8,192
- 1,000

6gBWuYT8MTCJiRJp3mLiPLSXDJpDCGrLyi4HpVissb5j - 8,192
- 1,000

59R1GU6qh4RiWQRvUFm4GzwBbTM2JStyTFmgpzruq9Gt []
292NEoCJ98FfhB62qZXXKqBQyLUij54roeH5VwBuXsSp []
HARGRBPyxF315bXDBCdaTnAD9cqMpwxvQnnzkZjhpVCA []
Ddstj2hPbGip8Ci26TUaEzY52DHZs3JphLFXy9UgWSRS []
FZZxePXsMfWpoepiPtdmc7EjRs3i8cmFF8xXJsFHKFB4 []
Aiux6s3V8wg398FHzWWy3LC81C8vuP4JLkck7uR9T3pD []
D9pVi21QMozECuZ6inVKQZP5UFrtusKUhW5mfW5fRxbK []
35A85gq6FRBFjMfdHDE6d7j5BYr786h4afy1wNcmdzre []
4TksThCbMYo8THcsADEckaCwurHSbn6EvDapfXvga97r []
JE3GQ7LhStnoTR5mSfJZE1gcLhTr2oMiURVH1C1ipsgo []
7Qa7fxRPtMc5R72cnNms4XWD9PJkeQJ6iD8iTU9T8p2o []
9if6GSLuz1awA9EAywgYWDdgyH7Aq79X68kv9adJNAFL []

This is an output of all the wireguard port marked as used for all the nodes from testnet.
While when I check the amount of network resource deployed on some nodes there should be more wireguard port marked as used.

This also make new provision of network fails cause user doesn't know which port is used or not. Which make there reservation failed with

[+] provisiond: 2020-03-02T14:10:15Z error failed to apply provision error="failed to create network resource for network U7Xfof9T9CHuL: failed to configure network resource: failed to configure wireguard interface: failed to bring wireguard interface w-U7Xfof9T9CHuL up: address already in use" id=1159-1```
cause the port picked but the user is actually already used

[zaibon]

I think one of the problem is here:

zos/pkg/network/networker.go

Lines 445 to 453 in 328df45

	cleanup := func() {
	log.Error().Msg("clean up network resource")
	if err := n.releasePort(netNR.WGListenPort); err != nil {
	log.Error().Err(err).Msg("release wireguard port failed")
	}
	if err := netr.Delete(); err != nil {
	log.Error().Err(err).Msg("error during deletion of network resource after failed deployment")
	}
	}

If something goes wrong when we try to delete the network resource, the port is already been marked as free while it might be not.

[zaibon]

The way we keep track of the reserved port on the node is still not correct.
At the moment we just keep a list of used port in memory, but this is lost during an restart of networkd.
We need to make this persistent between restart of networkd