Fix the use of unknown dateformat filter dateformat in tests.
Fix the use of unknown dateformat filter dateformat in tests.

Use strftime instead. There seems to be no dateformat filter in jinja
documentation.

bheesham/hyde,jngeist/hyde,netzverweigerer/hyde,netzverweigerer/hyde,netzverweigerer/hyde,jngeist/hyde,0111001101111010/hyde,hyde/hyde,Ali-Razmjoo/hyde,Valloric/hyde,JeNeSuisPasDave/hyde,0111001101111010/hyde,printerpam/hyde,jd/hyde,hyde/hyde,printerpam/hyde,JeNeSuisPasDave/hyde,bheesham/hyde,Ali-Razmjoo/hyde,jd/hyde,stiell/hyde,jd/hyde,jngeist/hyde,JeNeSuisPasDave/hyde,Ali-Razmjoo/hyde,Valloric/hyde,bheesham/hyde,stiell/hyde,printerpam/hyde,hyde/hyde