Fix assertRaises py2.6 support in  test_similarities
Fix assertRaises py2.6 support in  test_similarities

quole/gensim,laic/gensim,jaksmid/gensim,akutuzov/gensim,dsquareindia/gensim,Kreiswolke/gensim,tzoiker/gensim,Kreiswolke/gensim,olavurmortensen/gensim,gojomo/gensim,Kreiswolke/gensim,gojomo/gensim,tzoiker/gensim,bhargavvader/gensim,quole/gensim,gojomo/gensim,quole/gensim,markroxor/gensim,isohyt/gensim,mattilyra/gensim,robotcator/gensim,isohyt/gensim,RaRe-Technologies/gensim,robotcator/gensim,piskvorky/gensim,macks22/gensim,summanlp/gensim,summanlp/gensim,RaRe-Technologies/gensim,ELind77/gensim,ELind77/gensim,piskvorky/gensim,dsquareindia/gensim,olavurmortensen/gensim,akutuzov/gensim,ELind77/gensim,robotcator/gensim,olavurmortensen/gensim,laic/gensim,dsquareindia/gensim,markroxor/gensim,RaRe-Technologies/gensim,jaksmid/gensim,macks22/gensim,macks22/gensim,markroxor/gensim,loisaidasam/gensim,piskvorky/gensim,loisaidasam/gensim,isohyt/gensim,bhargavvader/gensim,summanlp/gensim,mattilyra/gensim,tzoiker/gensim,loisaidasam/gensim,laic/gensim,akutuzov/gensim,RaRe-Technologies/gensim,gojomo/gensim,jaksmid/gensim,bhargavvader/gensim,mattilyra/gensim