fix default scrape_uri in apache_exporter #532
Merged
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The default scrape_uri in the prometheus apache exporter actually has
a trailing slash. This matters because somehow, here, the address
without a trailing slash fails to scrape.
The default is documented here:
https://github.com/Lusitaniae/apache_exporter/blob/83d8e4d2003eaa85c754d12c110e0a7757e78143/apache_exporter.go#L30
Unit tests adjusted to match change.