Merging cpi-interest-rate-mortgage-rate with the housing-market-indicator-data

[anki112279]

Add CPI-interest-rate-mortgage-rate data to below housing-market-indicator-dataset and create an output file.
Ensure that the notebook's null values have been handled by the dataset owner before proceeding.
ottawa
calgary_section1
qubec cma_section1
edmonton_section1
winnipeg_section1_
hamilton_section1
saskatoon_section1
vancouver_section1
windsor_section1_
montral_section1_.csv
Toronto