(CFACT 92) Add memory facts for solaris

This patch adds support for system memory facts for solaris. Since swap
requires different handling, it is not included in this patch.
(CFACT-103) Add swap memory facts for solaris

This patch adds support for swap memory facts for solaris. It utilizes the
solaris swapctl systemcall to get information about the swap memory.
Merge pull request #119 from vrthra/fix/cfact-92/solaris-memory-facts

(CFACT 92) Support for memory facts for solaris