erchef 1.2.0

Updated deps:

  chef_db
    2013-01-15 e307803 Merge branch 'cm/OC-870/s3_instrumentation'
    2013-01-11 cbaeea9 stats_hero instrumentation of chef_s3
    2013-01-08 daec3a8 Removed mysql schema

  chef_objects
    2013-01-15 3505e67 Merge branch 'cm/OC-870/s3_instrumentation'
    2013-01-11 d619a68 Metrics label generation, including bookshelf

  chef_wm
    2013-01-15 e7ac753 Merge branch 'cm/OC-870/s3_instrumentation'
    2013-01-11 0ab2c90 Add stats_hero instrumentation to chef_s3 call
    2013-01-11 4369d1d Create metric labels for bookshelf / S3 upstream
    2013-01-11 f23f93d Use chef_metrics:label/2