Sharding support for conditional route manager

We support sharding for conditional route manager to fetch active route information from the main thread for conditions. Using this approach, the condition manager on the shard interacts with the route target (RT) proxy client to get active route information. The condition manager on the main thread interacts with the RT proxy server to send details to shards. The condition manager on shards stores active route information that is TRUE or FALSE for any condition and evaluates policy (having the condition) based on that. No change in the condition manager occurs on the main thread with respect to route lookup, flash mechanism, or dependent route operations such as additions or deletions. 

We have updated the following command outputs: 

• show policy condition 
• show policy condition detail 
• show policy condition
• show policy condition detail
• show policy condition rib-sharding
• show policy condition detail rib-sharding
• show policy condition rib-sharding
• show policy condition detail rib-sharding