Product attributes (add to metadata, put when create a project)
Added tests for attributeManager
Added tests for attributeManager
Get productTypeData after basic data
Add attributes to metadata in metaModelDataCollector
Removed unnecessary code
Merge pull request #14 from elasticio/product_metadata1_lena

Product attributes (add to metadata, put when create a project)
Merge pull request #15 from elasticio/master

Merging project metadata changes