Update StackdriverStatsExporter README about auto-detecting resources. (#1107)
Update StackdriverStatsExporter README about auto-detecting resources. (#1107)


songy23/instrumentation-java,bogdandrutu/opencensus-java,sebright/instrumentation-java,sebright/opencensus-java,songy23/instrumentation-java,bogdandrutu/instrumentation-java,bogdandrutu/opencensus-java,census-instrumentation/opencensus-java,bogdandrutu/opencensus-java,songy23/instrumentation-java,census-instrumentation/opencensus-java,sebright/instrumentation-java,sebright/opencensus-java,bogdandrutu/instrumentation-java,census-instrumentation/opencensus-java,sebright/opencensus-java