Add checks for HHS

[AlexGherardelli]

 HHS: The HHS module should contain values between 0 to 3 number depending on the number of days each behaviour has been applied; it is not possible to exceed (>3 ) or have negative values.
o HHS of 0, meaning that meaning that households had not experienced any hunger in the past 30 days. Check if FCS, rCSI, LCS and FES all indicate a very severe situation, flag to team leader.
o HHS of 5 or 6, meaning that households experienced very severe hunger in the past 30 days. Check against FCS, rCSI, LCS and FES. If all reflect an acceptable situation, flag to team leader.