1) Added new apis: createFirewallRule, deleteFirewallRule, listFirewallRules
2) Modified existing apis - added boolean openFirewall parameter to createPortForwardingRule/createIpForwardingRule/createRemoteAccessVpn. If parameter is set to true, open firewall on the domR before creating an actual PF rule there
Modified backend calls appropriately.
3) Schema changes for firewall_rules table:
* startPort/endPort can be null now
* added icmp_type, icmp_code fields (can be not null only when protocol is icmp)
4) Added new manager - FirewallManagerImpl
Conflicts:
api/src/com/cloud/api/BaseCmd.java
client/tomcatconf/commands.properties.in
server/src/com/cloud/api/ApiResponseHelper.java
server/src/com/cloud/configuration/DefaultComponentLibrary.java
server/src/com/cloud/network/lb/LoadBalancingRulesManagerImpl.java
server/src/com/cloud/network/rules/RulesManagerImpl.java
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