Fixed documentation in regards to property placeholder configuration
Fixed documentation in regards to property placeholder configuration

Closes #183
thomasdarimont/springfox,yelhouti/springfox,thomasdarimont/springfox,jlstrater/springfox,zorosteven/springfox,ammmze/swagger-springmvc,springfox/springfox,thomsonreuters/springfox,ammmze/swagger-springmvc,maksimu/springfox,zhiqinghuang/springfox,acourtneybrown/springfox,ammmze/swagger-springmvc,thomsonreuters/springfox,cbornet/springfox,kevinconaway/springfox,acourtneybrown/springfox,kevinconaway/springfox,yelhouti/springfox,wjc133/springfox,qq291462491/springfox,vmarusic/springfox,cbornet/springfox,zhiqinghuang/springfox,erikthered/springfox,RobWin/springfox,erikthered/springfox,springfox/springfox,thomasdarimont/springfox,jlstrater/springfox,wjc133/springfox,springfox/springfox,namkee/springfox,acourtneybrown/springfox,vmarusic/springfox,jlstrater/springfox,arshadalisoomro/springfox,qq291462491/springfox,izeye/springfox,RobWin/springfox,choiapril6/springfox,choiapril6/springfox,zorosteven/springfox,erikthered/springfox,cbornet/springfox,maksimu/springfox,kevinconaway/springfox,namkee/springfox,RobWin/springfox,wjc133/springfox,izeye/springfox,arshadalisoomro/springfox,zorosteven/springfox,thomsonreuters/springfox,arshadalisoomro/springfox,vmarusic/springfox,zhiqinghuang/springfox,maksimu/springfox,izeye/springfox,qq291462491/springfox,springfox/springfox,yelhouti/springfox,choiapril6/springfox,namkee/springfox