cf.copyLog.pgsql: deleted file, dependency dropped from schema
new file: cf.randint.pgsql: function returning a random integer within a range
ct.provision: corrected datatype of mdn column. dropped comment on previously dropped updatedtime column.
cf.randint: added function comment, corrected language parameter from volatile to stable
it.device: implemented randint() function
cf.randts: new file. function returns a random historical timestamp within a given number of years
ct.provision: renamed constraints to be consistent
new file: it.provision: initializes provision with random test data
ct.provision: added unique constraint to mdn column