web3.eth.compile.solidity is no longer working

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[go-ethereum-on-ubuntu](https://github.com/Azure/azure-quickstart-templates/tree/master/go-ethereum-on-ubuntu)

### Issue Details
web3.eth.compile.solidity is no longer working.
According to https://github.com/ethereum/EIPs/issues/209 eth_compile family of methods are deprecated.
Please update the documentation to get the sample working.

### Repro steps (*if necessary, delete otherwise*)
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Start with the go-ethereum-on-ubuntu sample linked in the issue and review its documentation for the web3.eth.compile.solidity usage. Check the cited EIP-209 deprecation and verify the sample's documented workflow; done means the documentation describes a working replacement.

Written by the indexing model from the issue text.