[MINOR][DOC] Fix the descriptions for `properties` argument in the documenation for jdbc APIs#14677

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HyukjinKwon wants to merge 2 commits intoapache:masterfrom

HyukjinKwon:typo-python

Commits on Aug 12, 2016

Fix docstring of method jdbc of PySpark DataFrameWriter because a dictionary of JDBC connection arguments is used instead of a list.
mvervuurt
committed

Commits on Aug 17, 2016

Fix the descriptions for `properties` argument in the documenation for jdbc APIs
HyukjinKwon
committed