fix example problem

[liuxiaocs7]

1. try to close CREATE SPACE error in example comment #63
2. add MetaAddress configuration to fix meta address can not be empty
3. change SSL type to fix ssl is enabled and sign type is SELF, selfSignParam must not be null

[codecov-commenter]

Codecov Report

Merging #71 (f707706) into master (428de90) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #71   +/-   ##
=========================================
  Coverage     49.72%   49.72%           
  Complexity      190      190           
=========================================
  Files            50       50           
  Lines          1613     1613           
  Branches        153      153           
=========================================
  Hits            802      802           
  Misses          743      743           
  Partials         68       68           

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