For a CIB object definition such as:
primitive database-config-default-fs ocf💓Filesystem \
params device="/dev/drbd/postgresql" directory="/var/lib/pgsql" fstype="" \
op monitor interval="10s"
when #extract_hash attempts to extract the 'params' section,
Shellwords.split will return an Array whose last element is
fstype=
not
fstype=""
as you might expect. Therefore we need to allow for an empty string to
the right of the equals sign, otherwise parsing fails.
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