Calendar.getDisplayNames inconsistent with DateFormatSymbols

FULL PRODUCT VERSION :
java version "9-ea"
Java(TM) SE Runtime Environment (build 9-ea+137)
Java HotSpot(TM) 64-Bit Server VM (build 9-ea+137, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Darwin McBookAir 15.6.0 Darwin Kernel Version 15.6.0: Mon Aug 29 20:21:34 PDT 2016; root:xnu-3248.60.11~1/RELEASE_X86_64 x86_64


A DESCRIPTION OF THE PROBLEM :
The results of DateFormatSymbols.getEras() is inconsistent with results of Calendar.getDisplayNames(Calendar.ERA, Calendar.ALL_STYLES, locale)

For Gregorian calendars (not thai and japanese locales), I expect that the map returned from getDisplayNames() contains all of the values returned from DateFormatSymbols.getEras().

However, this is not the case for "qu", "no", and "zh" locales.

REGRESSION. Last worked in version 8u92

ADDITIONAL REGRESSION INFORMATION:
java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the unit test case below.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Locale: ja_JP_JP_#u-ca-japanese name: ??? not in map
Locale: th_TH name: ?.?. not in map
Locale: th_TH_TH_#u-nu-thai name: ?.?. not in map
ACTUAL -
Locale: qu_EC name: not in map
Locale: no name: BC not in map
Locale: no name: AD not in map
Locale: qu name: not in map
Locale: qu_PE name: not in map
Locale: th_TH_TH_#u-nu-thai name: ปีก่อนคริสต์กาลที่ not in map
Locale: th_TH_TH_#u-nu-thai name: ค.ศ. not in map
Locale: no_NO name: BC not in map
Locale: no_NO name: AD not in map
Locale: qu_BO name: not in map
Locale: ja_JP_JP_#u-ca-japanese name: 紀元前 not in map
Locale: zh_HK name: 西元前 not in map
Locale: zh_HK name: 西元 not in map
Locale: th_TH name: ปีก่อนคริสต์กาลที่ not in map
Locale: th_TH name: ค.ศ. not in map


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------

    @Test
    public void testDisplayNames() {
        for(final Locale locale : Locale.getAvailableLocales()) {
            Calendar cal = Calendar.getInstance(locale);
            Map<String,Integer> names= cal.getDisplayNames(Calendar.ERA, Calendar.ALL_STYLES, locale);

            DateFormatSymbols symbols = new DateFormatSymbols(locale);
            String[] eras = symbols.getEras();
            for(String era : eras) {
                if(!names.containsKey(era)) {
                System.err.println("Locale: "+locale+" name: "+era+" not in map");
                }
            }
        }
    }

---------- END SOURCE ----------