PARQUET-862: Provide defaut cache size values
PARQUET-862: Provide defaut cache size values

This patch allows to port parquet-cpp on non-intel architectures
and/or linux/unix flavors where CPU info is different or not
available. Tested on Alpinelinux (musl libc).

Author: Marc Vertes <mvertes@free.fr>

Closes #234 from mvertes/master and squashes the following commits:

1b087be [Marc Vertes] PARQUET-862: Provide defaut cache size values

Change-Id: I600915833d8f942f96e2cf38240493709c95b28c

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