a0_m4_exercice3.1.ipynb: database format should be "com.cloudant.spark"

[miraculixx]

Currently

def readDataFrameFromCloudant(database):
    cloudantdata=spark.read.load(database, "org.apache.bahir.cloudant")
    (...)

This results in exception Py4JJavaError: An error occurred while calling o274.load. : java.lang.ClassNotFoundException: Failed to find data source: org.apache.bahir.cloudant.

Expected

def readDataFrameFromCloudant(database):
    cloudantdata=spark.read.load(database, "com.cloudant.spark")