[mod:Baby.php,Bmi.php] Modify validation rules and message

Modify validation rules with regex and custom valdation messages
in Baby and Bmi models.
[mod:php] Modify validation rules and messages of 4 models

Modify validation rules by adding regex and custom messages to Baby,
ChildGrowth, Determinant, FamilyMember models.
[mod:php] Modify models with validation rules and messages.

Modify FieldCommunity, FieldGroup, FieldGroupProgress and FlourUsage
models with regex and custom validation messages.
[mod:php] Modify models with validation rule and messages.

Modify HealthGroupProgress, HealthIssue, HealthIssueGroup and
HealthIssueInCommunity models with regex validation rules and custom
messages
[mod:php] Modify models with validation rules and custom messages.

Modify Household, Indicator, Legend and NavigationDetail models with
 regex and custom validation messages.
[mod:php] Modify models with validation rules and custom messages

Modify OilUsage, PregnantMother and PregnantMotherKnowledge models
with regex for validation and custom messages.