Stringify dates in the processed_crash dict instead of default.
Stringify dates in the processed_crash dict instead of default.

HBase needs the dates in string form in other places as well, so it not
only affects the JSON dumps but also the timestamps in HBase column
mutations.

bsmedberg/socorro,luser/socorro,luser/socorro,Tchanders/socorro,linearregression/socorro,Tchanders/socorro,m8ttyB/socorro,Tchanders/socorro,cliqz/socorro,twobraids/socorro,Tayamarn/socorro,rhelmer/socorro,cliqz/socorro,bsmedberg/socorro,m8ttyB/socorro,m8ttyB/socorro,linearregression/socorro,mozilla/socorro,KaiRo-at/socorro,yglazko/socorro,m8ttyB/socorro,pcabido/socorro,adngdb/socorro,twobraids/socorro,m8ttyB/socorro,yglazko/socorro,adngdb/socorro,linearregression/socorro,KaiRo-at/socorro,KaiRo-at/socorro,AdrianGaudebert/socorro,luser/socorro,luser/socorro,rhelmer/socorro,AdrianGaudebert/socorro,pcabido/socorro,adngdb/socorro,cliqz/socorro,twobraids/socorro,spthaolt/socorro,mozilla/socorro,luser/socorro,linearregression/socorro,spthaolt/socorro,pcabido/socorro,lonnen/socorro,cliqz/socorro,Tayamarn/socorro,Tchanders/socorro,rhelmer/socorro,Tayamarn/socorro,spthaolt/socorro,Serg09/socorro,m8ttyB/socorro,rhelmer/socorro,Tayamarn/socorro,mozilla/socorro,mozilla/socorro,mozilla/socorro,bsmedberg/socorro,spthaolt/socorro,mozilla/socorro,Serg09/socorro,rhelmer/socorro,yglazko/socorro,pcabido/socorro,lonnen/socorro,lonnen/socorro,pcabido/socorro,cliqz/socorro,Tayamarn/socorro,adngdb/socorro,AdrianGaudebert/socorro,yglazko/socorro,Serg09/socorro,KaiRo-at/socorro,lonnen/socorro,KaiRo-at/socorro,KaiRo-at/socorro,AdrianGaudebert/socorro,yglazko/socorro,Serg09/socorro,spthaolt/socorro,bsmedberg/socorro,yglazko/socorro,linearregression/socorro,AdrianGaudebert/socorro,adngdb/socorro,Tchanders/socorro,twobraids/socorro,twobraids/socorro,Tayamarn/socorro,rhelmer/socorro,AdrianGaudebert/socorro,adngdb/socorro,pcabido/socorro,twobraids/socorro,Serg09/socorro,bsmedberg/socorro,cliqz/socorro,luser/socorro,spthaolt/socorro,linearregression/socorro,Tchanders/socorro,Serg09/socorro