Equihash 192,7 Incorrect Solution Size
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### Description

Hi, I have managed to add Equihash 192, 7 to mining core with the help of @bitspill. I am now receiving a lot of rejected shares when trying to mine Vidulum. 

Here is my conf file, 
```
"vidulum": {
      "name": "Vidulum",
      "symbol": "VDL",
      "family": "equihash",
      "networks": {
        "main": {
		  "diff1": "0007ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
          "solutionSize": 100,
          "solutionPreambleSize": 1,
          "solver": {
            "hash": "equihash",
            "args": [ 192, 7, "EquivPoW" ]
          },
          "coinbaseTxNetwork": "main",
          "payFoundersReward": false
        },
        "test": {
          "diff1": "0007ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
          "solutionSize": 100,
          "solutionPreambleSize": 1,
          "solver": {
            "hash": "equihash",
            "args": [ 192, 7, "EquivPoW" ]
          },
          "coinbaseTxNetwork": "testnet",
          "payFoundersReward": false
        },
        "regtest": {
          "diff1": "0007ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
          "solutionSize": 100,
          "solutionPreambleSize": 1,
          "solver": {
            "hash": "equihash",
            "args": [ 192, 7, "EquivPoW" ]
          },
          "coinbaseTxNetwork": "regtest",
          "payFoundersReward": false
        }
      },
      "usesZCashAddressFormat": true,
      "useBitcoinPayoutHandler": false,
      "explorerBlockLink": "https://explorer.vidulum.app/block/$hash$",
      "explorerTxLink": "https://explorer.vidulum.app/tx/{0}",
      "explorerAccountLink": "https://explorer.vidulum.app/address/{0}"
    }

```
I believe the issue is with these two strings,          
```
"solutionSize": 100,
"solutionPreambleSize": 1,
```
When mining to the pool I receive this error 

[2019-02-13 16:45:17.8383] [I] [vidulum1] [0HLKHH0C2KCGG] Share rejected: incorrect size of solution


Does anyone know the correct solutionSize for Equihash 192,7 and the correct solutionPreambleSize? 
### Steps to Reproduce

1. Add Equihash 192,7 Supprt
2. Create Coin,json for Equihash 192,7
3. Run Pool

### Expected behavior

I expect to be able to mine and hit successful shares submitted.

### Actual behavior

I get a bunch of rejected sharess

### Reproduces how often

[What percentage of the time does it reproduce?]
100%
### Version
Latest version of MiningCore with some amendments to allow Lyra2v3 and x21s.

### Additional Information

Any additional information, log, configuration or data that might be necessary to reproduce the issue.
