[SPARK-6274][Streaming][Examples] Added examples streaming + sql examples.

[tdas]

Added Scala, Java and Python streaming examples showing DataFrame and SQL operations within streaming.

[SparkQA]

Test build #28461 has started for PR 4975 at commit 5fbf789.

• This patch merges cleanly.

[SparkQA]

Test build #28461 has finished for PR 4975 at commit 5fbf789.

• This patch fails Python style tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • public class JavaRecord implements java.io.Serializable
  • public final class JavaSqlNetworkWordCount
  • class JavaSQLContextSingleton
  • case class Record(word: String)

[AmplabJenkins]

Test FAILed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/SparkPullRequestBuilder/28461/
Test FAILed.

[rxin]

lgtm -- assuming it compiles

[SparkQA]

Test build #28462 has started for PR 4975 at commit 75a3fad.

• This patch merges cleanly.

[SparkQA]

Test build #28462 has finished for PR 4975 at commit 75a3fad.

• This patch fails Python style tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • public class JavaRecord implements java.io.Serializable
  • public final class JavaSqlNetworkWordCount
  • class JavaSQLContextSingleton
  • case class Record(word: String)

[AmplabJenkins]

Test FAILed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/SparkPullRequestBuilder/28462/
Test FAILed.

[SparkQA]

Test build #28463 has started for PR 4975 at commit 705cba1.

• This patch merges cleanly.

[SparkQA]

Test build #28463 has finished for PR 4975 at commit 705cba1.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • public class JavaRecord implements java.io.Serializable
  • public final class JavaSqlNetworkWordCount
  • class JavaSQLContextSingleton
  • case class Record(word: String)

[AmplabJenkins]

Test PASSed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/SparkPullRequestBuilder/28463/
Test PASSed.