Wrap all mode checks with whitespace, along with comparison strings, so only exact string matches are allowed, preventing clashes when output modes are named similarly, e.g. 'json' and 'json-asff'

Fixes #571

include/junit_integration

@@ -16,7 +16,7 @@
 JUNIT_OUTPUT_DIRECTORY="junit-reports"
 
 is_junit_output_enabled() {
-  if [[ ${MODES[@]} =~ "junit-xml" ]]; then
+  if [[ " ${MODES[@]} " =~ " junit-xml " ]]; then
     true
   else
     false