Port from v4 | README Update : Using system properties to modify default Direct TCP options (#7640)
Port from v4 | README Update : Using system properties to modify default Direct TCP options (#7640)

* Port from v4

* Corrected package misspelling in log4j.properties and removed System.exit from Main.java

* Responded to code review comments

* Updated sdk/cosmos/README.md with info on using system properties to modify default Direct TCP options

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