[Bug fix] Use default max size to call getAll ES API

[zhongnansu]

Issue #, if available:

The default query size in ES side is set to 100, should pass in parameter if we want to retrieve more data

Description of changes:

• From Kibana side, add fromIndex and maxItems as optional params, and use default value 10000 for maxItems.
• Test with 10000 report instances added. Browser response time is within 4 secs. It's tolerable for the initial release.
• TODO: need to implement pagination in the EUI, currently the table eui component is EuiInMemoryTable, which requires all possible data to be loaded. Need to consider use low level components such as EuiBasicTable along with EuiPagination, EuiSearchBar

Others

• set enabled field to be true when switching from on-demand to scheduled report definition

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[davidcui1225]

LGTM