rename var for clarity

lib/knockoff/config.rb

@@ -8,11 +8,11 @@ class Config
     attr_reader :replica_configs
 
     # A hash of replica configs to their config hash.
-    attr_reader :replicas_configurations
+    attr_reader :replicas_configuration_hash
 
     def initialize
       @environment = 'development'
-      @replicas_configurations = {}
+      @replicas_configuration_hash = {}
       set_replica_configs
 
       if !properly_configured? && Knockoff.enabled
@@ -58,7 +58,7 @@ def update_replica_configs(new_configs)
         updated_config = new_configs.deep_dup.merge!(ActiveRecord::Base.configurations.configs_for(env_name: 'knockoff_replicas').first.configuration_hash)
       end
 
-      @replicas_configurations.each do |key, _config|
+      @replicas_configuration_hash.each do |key, _config|
         update_replica_config(key, updated_config)
       end
     end
@@ -73,16 +73,16 @@ def properly_configured?
     private
 
     def update_replica_config(key, updated_config)
-      merged_config = @replicas_configurations[key].configuration_hash.deep_dup.merge!(updated_config)
-      @replicas_configurations[key] = ActiveRecord::DatabaseConfigurations::HashConfig.new(key, key, merged_config)
-      ActiveRecord::Base.configurations.configurations << @replicas_configurations[key]
+      merged_config = @replicas_configuration_hash[key].configuration_hash.deep_dup.merge!(updated_config)
+      @replicas_configuration_hash[key] = ActiveRecord::DatabaseConfigurations::HashConfig.new(key, key, merged_config)
+      ActiveRecord::Base.configurations.configurations << @replicas_configuration_hash[key]
     end
 
     def register_replica_copy(index, env_key, configuration_hash)
       key = "knockoff_replica_#{index}"
       new_config = create_replica_copy(env_key, key, configuration_hash.deep_dup)
       ActiveRecord::Base.configurations.configurations << new_config
-      @replicas_configurations[key] = new_config
+      @replicas_configuration_hash[key] = new_config
     end
 
     def create_replica_copy(env_key, key, replica_config_hash)