SEN-19: add test case for ip behavior module

automated test case for ip behavior module

Signed-off-by: paulyang <y_y@neusoft.com>
SEN-19: add test case for condition parameter

add test case for condition parameter in limit_req directive

Signed-off-by: paulyang <y_y@neusoft.com>
SEN-19: add ip behavior module

as the following functionality:
  * provide sensitive_url behavior check
  * provide the results by $insensitive_percent variable

Signed-off-by: paulyang <y_y@neusoft.com>
SEN-19: introduce tengine's limit req module

as the following:
  * support multi-vars in limit req zone directive
  * support forbid action in limit req directive

Signed-off-by: paulyang <y_y@neusoft.com>
SEN-19: change other modules to support SEN-19

as the following:
  * change ip blacklist module to support named location
  * change named location to re-run phase from NS Layer

Signed-off-by: paulyang <y_y@neusoft.com>
add tengine's style checker

Signed-off-by: paulyang <y_y@neusoft.com>