Redirect to fusion partner if the gene in query does not have any matched result

[zhx828]

For instance EML4-ALK Fusion is curated under ALK. When cbioportal refers to this fusion, since it does not know which gene OncoKB has this fusion curated under, they just link out to first gene within the gene fusion. https://www.oncokb.org/gene/EML4/EML4-ALK%20Fusion

In this case, the page shows variant unknown which is not true. We should redirect the user to https://www.oncokb.org/gene/ALK/EML4-ALK%20Fusion