fix(reporters): format fix for console log

fix to issue caused when colors was disabled. change to base reporter
string formats for single and multi browser logs, so they have the same
placeholders as in base_color.js.

tested with chrome, firefox and phantomjs

Closes #934
Merge remote-tracking branch 'upstream/master' into fix-consolelogbase
fix(reporter) fix to string format for log

Added unit tests to confirm fix
Merge pull request #1010 from joshjb84/fix-consolelogbase

fix(reporters): format fix for console log