[SPARK-4954][Core] add spark version infomation in log for standalone mode

[liyezhang556520]

The master and worker spark version may be not the same with Driver spark version. That is because spark Jar file might be replaced for new application without restarting the spark cluster. So there shall log out the spark-version in both Mater and Worker log.

[SparkQA]

Test build #24781 has started for PR 3790 at commit e05e1e3.

• This patch merges cleanly.

[SparkQA]

Test build #24781 has finished for PR 3790 at commit e05e1e3.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[AmplabJenkins]

Test PASSed.
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[pwendell]

Looks good - but can we use the exact same wording in both cases? It will be obvious from the previous log message whether it is the master or worker:

I'd just say "Running Spark version XXX", the same as in 39272c8#diff-364713d7776956cb8b0a771e9b62f82dR176

[pwendell]

Actually I can just merge this and add the fix.