Fix up earthquake data push-pull adapter example (#345)

Add PushPullAdapter example with earthquake data

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Signed-off-by: Melissa Weber Mendonça <melissawm@gmail.com>
Signed-off-by: Adam Glustein <Adam.Glustein@Point72.com>
Co-authored-by: Melissa Weber Mendonça <melissawm@gmail.com>

Author: AdamGlustein

examples/07_end_to_end/README.md

@@ -3,3 +3,4 @@
 - [Wikipedia Updates and Edits](./wikimedia.ipynb)
 - [Seismic Data with obspy](./seismic_waveform.ipynb)
 - [MTA Subway Data](./mta.ipynb)
+- [Earthquake Data PushPullAdapter](./earthquake.ipynb)