Generic message validation

Jira-issue: WP-349
deliveryNotification messages validation

Jira-issue: WP-349
JSONRPC20 Request and Response messages validation

Jira-issue: WP-349
Prop message validation

Jira-issue: WP-349
Bugfixing

Jira-issue: WP-349
Replaced old functions with checkByType function

Jira-issue: WP-349
Generic message validation jasmine test

Jira-issue: WP-349
Prop message validation jasmine test

Jira-issue: WP-349
deliveryNotification message validation jasmine test

Jira-issue: WP-349
JSONRPC messages validation jasmine test

Jira-issue: WP-349
Added old messages validation for backward compatibility

Jira-issue: WP-349
Added old messages validation jasmine tests

Jira-issue: WP-349
Whitelisted jasmine tests in Travis script

Jira-issue: WP-349
Merge pull request #529 from ccameroni/WP-349-messages-schema-check

WP-349 messages schema check