[MONDRIAN-1471] The fields in QueryTiming were accessed by multiple threads w/o synchronization, leaving the possibility of stale data.  Added synchronization on public methods.
[MONDRIAN-1471] The fields in QueryTiming were accessed by multiple threads w/o synchronization, leaving the possibility of stale data.  Added synchronization on public methods.

truvenganong/mondrian,bmorrise/mondrian,AvinashPD/mondrian,lgrill-pentaho/mondrian,AvinashPD/mondrian,bmorrise/mondrian,lgrill-pentaho/mondrian,sayanh/mondrian,julianhyde/mondrian,wetet2/mondrian,wetet2/mondrian,cesarmarinhorj/mondrian,pedrofvteixeira/mondrian,dkincade/mondrian,stiberger/mondrian,bmorrise/mondrian,pedrofvteixeira/mondrian,openedbox/mondrian,mustangore/mondrian,pedrofvteixeira/mondrian,ivanpogodin/mondrian,julianhyde/mondrian,cesarmarinhorj/mondrian,sayanh/mondrian,preisanalytics/mondrian,mustangore/mondrian,stiberger/mondrian,ivanpogodin/mondrian,nextelBIS/mondrian,OSBI/mondrian,mdamour1976/mondrian,ivanpogodin/mondrian,openedbox/mondrian,preisanalytics/mondrian,openedbox/mondrian,Seiferxx/mondrian,stiberger/mondrian,syncron/mondrian,pentaho/mondrian,pentaho/mondrian,dkincade/mondrian,sayanh/mondrian,cocosli/mondrian,mdamour1976/mondrian,Seiferxx/mondrian,nextelBIS/mondrian,dkincade/mondrian,wetet2/mondrian,mdamour1976/mondrian,cesarmarinhorj/mondrian,mustangore/mondrian,Seiferxx/mondrian,OSBI/mondrian,syncron/mondrian,truvenganong/mondrian,truvenganong/mondrian,cocosli/mondrian,OSBI/mondrian,lgrill-pentaho/mondrian,syncron/mondrian,AvinashPD/mondrian,pentaho/mondrian,preisanalytics/mondrian,cocosli/mondrian,nextelBIS/mondrian