PHPMessDetectorBearTest: Close test files properly
PHPMessDetectorBearTest: Close test files properly

Closes https://github.com/coala/coala-bears/issues/2047

refeed/coala-bears,aptrishu/coala-bears,ankit01ojha/coala-bears,refeed/coala-bears,refeed/coala-bears,coala/coala-bears,coala/coala-bears,coala/coala-bears,coala/coala-bears,aptrishu/coala-bears,refeed/coala-bears,aptrishu/coala-bears,coala-analyzer/coala-bears,coala-analyzer/coala-bears,refeed/coala-bears,aptrishu/coala-bears,coala/coala-bears,ankit01ojha/coala-bears,coala-analyzer/coala-bears,aptrishu/coala-bears,refeed/coala-bears,ankit01ojha/coala-bears,coala-analyzer/coala-bears,aptrishu/coala-bears,refeed/coala-bears,ankit01ojha/coala-bears,coala/coala-bears,coala/coala-bears,refeed/coala-bears,aptrishu/coala-bears,refeed/coala-bears,coala/coala-bears,ankit01ojha/coala-bears,ankit01ojha/coala-bears,coala/coala-bears,refeed/coala-bears,coala-analyzer/coala-bears,ankit01ojha/coala-bears,coala-analyzer/coala-bears,coala/coala-bears,aptrishu/coala-bears,coala/coala-bears,coala-analyzer/coala-bears,ankit01ojha/coala-bears,ankit01ojha/coala-bears,aptrishu/coala-bears,coala-analyzer/coala-bears,ankit01ojha/coala-bears,coala-analyzer/coala-bears,aptrishu/coala-bears,ankit01ojha/coala-bears,coala/coala-bears,refeed/coala-bears,aptrishu/coala-bears