test: http_admin: fix wrong pack of ack_expectations[uuid]
test: http_admin: fix wrong pack of ack_expectations[uuid]

ack_expectations[uuid] needs an object instead of a number.

It's a long time ago change since commit 7b52a05("Fix log, refactor
get_durability, fix switch primary"), however that commit forgot to
change it on http_admin.py side, thus introduced following error
while running regress-852 test:

    Traceback (most recent call last):
      File "$RETHINKDBtest/regression/issue_852.py", line 41, in <module>
        affinities = {dc: 1}, ack_expectations = {dc: 2})
      File "$RETHINKDB/test/common/http_admin.py", line 562, in add_namespace
        info = self.do_query("POST", "/ajax/semilattice/%s_namespaces/new" % protocol, data_to_post)
      File "$RETHINKDB/test/common/http_admin.py", line 349, in do_query
        return self.do_query_specific(host, http_port, method, route, payload)
      File "$RETHINKDB/test/common/http_admin.py", line 361, in do_query_specific
        return json.loads(self.do_query_specific_plaintext(host, http_port, method, route, payload, headers))
      File "$RETHINKDB/test/common/http_admin.py", line 374, in do_query_specific_plaintext
        raise BadServerResponse(response.status, response.reason)
    http_admin.BadServerResponse: Server returned error code: 400 Bad Request

And you can see following error from rethinkdb log:

    info: HTTP request throw a schema_mismatch_exc_t with what = Expected object instead got: 2

This patch does make the "400 Bad Request" error dispear, but the
testcase still failed due to rethinkdb crash.

Signed-off-by: Liu Aleaxander <c31ab6cae8e3070661bca47ec9430a3aeb4cd246@gmail.com>

gdi2290/rethinkdb,dparnell/rethinkdb,rrampage/rethinkdb,urandu/rethinkdb,lenstr/rethinkdb,jesseditson/rethinkdb,lenstr/rethinkdb,yakovenkodenis/rethinkdb,sbusso/rethinkdb,wkennington/rethinkdb,tempbottle/rethinkdb,niieani/rethinkdb,ayumilong/rethinkdb,lenstr/rethinkdb,mcanthony/rethinkdb,sontek/rethinkdb,gavioto/rethinkdb,losywee/rethinkdb,losywee/rethinkdb,pap/rethinkdb,sontek/rethinkdb,wkennington/rethinkdb,alash3al/rethinkdb,greyhwndz/rethinkdb,KSanthanam/rethinkdb,captainpete/rethinkdb,Wilbeibi/rethinkdb,tempbottle/rethinkdb,ajose01/rethinkdb,wkennington/rethinkdb,dparnell/rethinkdb,wkennington/rethinkdb,bchavez/rethinkdb,scripni/rethinkdb,mbroadst/rethinkdb,yakovenkodenis/rethinkdb,pap/rethinkdb,gavioto/rethinkdb,grandquista/rethinkdb,pap/rethinkdb,bpradipt/rethinkdb,ajose01/rethinkdb,wujf/rethinkdb,greyhwndz/rethinkdb,spblightadv/rethinkdb,greyhwndz/rethinkdb,captainpete/rethinkdb,ayumilong/rethinkdb,spblightadv/rethinkdb,losywee/rethinkdb,catroot/rethinkdb,marshall007/rethinkdb,RubenKelevra/rethinkdb,captainpete/rethinkdb,niieani/rethinkdb,sbusso/rethinkdb,KSanthanam/rethinkdb,ayumilong/rethinkdb,Qinusty/rethinkdb,gavioto/rethinkdb,mcanthony/rethinkdb,scripni/rethinkdb,grandquista/rethinkdb,eliangidoni/rethinkdb,matthaywardwebdesign/rethinkdb,sebadiaz/rethinkdb,jesseditson/rethinkdb,tempbottle/rethinkdb,wkennington/rethinkdb,urandu/rethinkdb,mcanthony/rethinkdb,4talesa/rethinkdb,KSanthanam/rethinkdb,wojons/rethinkdb,jesseditson/rethinkdb,robertjpayne/rethinkdb,eliangidoni/rethinkdb,AntouanK/rethinkdb,lenstr/rethinkdb,tempbottle/rethinkdb,elkingtonmcb/rethinkdb,victorbriz/rethinkdb,bpradipt/rethinkdb,Qinusty/rethinkdb,bchavez/rethinkdb,gavioto/rethinkdb,bpradipt/rethinkdb,JackieXie168/rethinkdb,wkennington/rethinkdb,greyhwndz/rethinkdb,mquandalle/rethinkdb,eliangidoni/rethinkdb,grandquista/rethinkdb,sebadiaz/rethinkdb,Qinusty/rethinkdb,jmptrader/rethinkdb,wkennington/rethinkdb,KSanthanam/rethinkdb,matthaywardwebdesign/rethinkdb,wojons/rethinkdb,grandquista/rethinkdb,urandu/rethinkdb,dparnell/rethinkdb,gdi2290/rethinkdb,robertjpayne/rethinkdb,JackieXie168/rethinkdb,elkingtonmcb/rethinkdb,sbusso/rethinkdb,4talesa/rethinkdb,urandu/rethinkdb,scripni/rethinkdb,sontek/rethinkdb,yaolinz/rethinkdb,bpradipt/rethinkdb,Qinusty/rethinkdb,losywee/rethinkdb,marshall007/rethinkdb,mbroadst/rethinkdb,lenstr/rethinkdb,lenstr/rethinkdb,marshall007/rethinkdb,grandquista/rethinkdb,pap/rethinkdb,ajose01/rethinkdb,jmptrader/rethinkdb,eliangidoni/rethinkdb,eliangidoni/rethinkdb,spblightadv/rethinkdb,spblightadv/rethinkdb,bpradipt/rethinkdb,bchavez/rethinkdb,marshall007/rethinkdb,KSanthanam/rethinkdb,matthaywardwebdesign/rethinkdb,sbusso/rethinkdb,robertjpayne/rethinkdb,yaolinz/rethinkdb,pap/rethinkdb,sontek/rethinkdb,scripni/rethinkdb,jmptrader/rethinkdb,matthaywardwebdesign/rethinkdb,sebadiaz/rethinkdb,mquandalle/rethinkdb,alash3al/rethinkdb,dparnell/rethinkdb,alash3al/rethinkdb,gdi2290/rethinkdb,elkingtonmcb/rethinkdb,mquandalle/rethinkdb,bpradipt/rethinkdb,urandu/rethinkdb,losywee/rethinkdb,mcanthony/rethinkdb,jesseditson/rethinkdb,captainpete/rethinkdb,losywee/rethinkdb,sebadiaz/rethinkdb,elkingtonmcb/rethinkdb,rrampage/rethinkdb,wojons/rethinkdb,bchavez/rethinkdb,bchavez/rethinkdb,Wilbeibi/rethinkdb,bpradipt/rethinkdb,wkennington/rethinkdb,Wilbeibi/rethinkdb,tempbottle/rethinkdb,rrampage/rethinkdb,jesseditson/rethinkdb,RubenKelevra/rethinkdb,gavioto/rethinkdb,wujf/rethinkdb,Qinusty/rethinkdb,ajose01/rethinkdb,robertjpayne/rethinkdb,marshall007/rethinkdb,wojons/rethinkdb,dparnell/rethinkdb,yaolinz/rethinkdb,sontek/rethinkdb,sontek/rethinkdb,ajose01/rethinkdb,niieani/rethinkdb,bchavez/rethinkdb,mbroadst/rethinkdb,gavioto/rethinkdb,RubenKelevra/rethinkdb,wujf/rethinkdb,4talesa/rethinkdb,eliangidoni/rethinkdb,jmptrader/rethinkdb,mquandalle/rethinkdb,wojons/rethinkdb,tempbottle/rethinkdb,eliangidoni/rethinkdb,JackieXie168/rethinkdb,rrampage/rethinkdb,grandquista/rethinkdb,yakovenkodenis/rethinkdb,victorbriz/rethinkdb,yakovenkodenis/rethinkdb,RubenKelevra/rethinkdb,KSanthanam/rethinkdb,ayumilong/rethinkdb,niieani/rethinkdb,niieani/rethinkdb,Qinusty/rethinkdb,grandquista/rethinkdb,4talesa/rethinkdb,ajose01/rethinkdb,RubenKelevra/rethinkdb,spblightadv/rethinkdb,ajose01/rethinkdb,AntouanK/rethinkdb,gdi2290/rethinkdb,eliangidoni/rethinkdb,jmptrader/rethinkdb,4talesa/rethinkdb,yakovenkodenis/rethinkdb,matthaywardwebdesign/rethinkdb,captainpete/rethinkdb,pap/rethinkdb,victorbriz/rethinkdb,mbroadst/rethinkdb,dparnell/rethinkdb,Qinusty/rethinkdb,robertjpayne/rethinkdb,mbroadst/rethinkdb,losywee/rethinkdb,JackieXie168/rethinkdb,gavioto/rethinkdb,pap/rethinkdb,sebadiaz/rethinkdb,spblightadv/rethinkdb,greyhwndz/rethinkdb,gavioto/rethinkdb,scripni/rethinkdb,yakovenkodenis/rethinkdb,KSanthanam/rethinkdb,catroot/rethinkdb,RubenKelevra/rethinkdb,lenstr/rethinkdb,sontek/rethinkdb,matthaywardwebdesign/rethinkdb,rrampage/rethinkdb,mcanthony/rethinkdb,bpradipt/rethinkdb,catroot/rethinkdb,victorbriz/rethinkdb,mbroadst/rethinkdb,mbroadst/rethinkd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