Bad resolve where main section in module's bower.json is array

In getModulePath function, relFilePath is set to thisModuleName + extension. If in main section of bower.json array is declared and main files are not having 'extension', it is incorrectly set to module + extension.

Start by locating the getModulePath function and inspect how it handles the main section of bower.json when that section is an array. Reproduce the case with main files that omit the extension. Done means resolving the correct main file path without incorrectly appending the module extension.

Written by the indexing model from the issue text.