Update the java client documentation

[jaydeluca]

While approaching using the client for the first time, I encountered a few things that took me a while to sort out, so I wanted to contribute to the docs so it might be more clear.

I also came across other related issues where others discuss these same issues:

• ClickHouseNodes.of(String endpoints) Unable to connect localhost Clickhouse client clickhouse-java#1510
• LZ4 is not supported. Please disable compression(compress=0) clickhouse-java#1317

What I changed in this PR:

• I added another example for how to connect to a cluster with a single node using a connection string that doesn't include the jdbc:ch prefix. I had originally tried copying the example code with that included and got all kinds of errors with using the jdbc:ch:http://server1.domain format. I am not sure if the original code is correct or not, but if someone can help me confirm i can either leave it or update it if it needs changing
• I added a section about the LZ4 dependency, showing how to add it or how to work around it. This tripped me up for a bit figuring out how to change/disable it.
• I updated the limit syntax in the queries. I couldn't get the syntax in the examples to work with the limit in parenthesis.

I am new to using this client, so I apologize if I'm misunderstanding something or missing something obvious. I think these additions might make it easier for others who try to use the example code snippets as a starting point.

[CLAassistant]

All committers have signed the CLA.

[mzitnik]

@chernser is it still relevant?