Update modules and packages to allow for a single grpc import

- ensured tests only need to do 'require grpc'
- ensured that the example math_server and math_client only need to do 'require grpc'
- ensured that the other other client and servers only need to do one thing
	Change on 2014/12/11 by temiola <temiola@google.com>
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=81894613
diff --git a/src/ruby/lib/grpc.rb b/src/ruby/lib/grpc.rb
index 1012a83..c7eec33 100644
--- a/src/ruby/lib/grpc.rb
+++ b/src/ruby/lib/grpc.rb
@@ -34,6 +34,10 @@
 require 'grpc/version'
 require 'grpc/core/event'
 require 'grpc/core/time_consts'
+require 'grpc/generic/active_call'
+require 'grpc/generic/client_stub'
+require 'grpc/generic/service'
+require 'grpc/generic/rpc_server'
 
 # alias GRPC
 GRPC = Google::RPC
diff --git a/src/ruby/lib/grpc/generic/active_call.rb b/src/ruby/lib/grpc/generic/active_call.rb
index 95cc7fc..187c238 100644
--- a/src/ruby/lib/grpc/generic/active_call.rb
+++ b/src/ruby/lib/grpc/generic/active_call.rb
@@ -28,7 +28,6 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 require 'forwardable'
-require 'grpc'
 require 'grpc/generic/bidi_call'
 
 def assert_event_type(ev, want)
@@ -37,7 +36,7 @@
   raise 'Unexpected rpc event: got %s, want %s' % [got, want] unless got == want
 end
 
-module GRPC
+module Google::RPC
 
   # The ActiveCall class provides simple methods for sending marshallable
   # data to a call
diff --git a/src/ruby/lib/grpc/generic/bidi_call.rb b/src/ruby/lib/grpc/generic/bidi_call.rb
index 91ceaa9..74cc9db 100644
--- a/src/ruby/lib/grpc/generic/bidi_call.rb
+++ b/src/ruby/lib/grpc/generic/bidi_call.rb
@@ -28,9 +28,9 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 require 'forwardable'
-require 'grpc'
+require 'grpc/grpc'
 
-module GRPC
+module Google::RPC
 
   # The BiDiCall class orchestrates exection of a BiDi stream on a client or
   # server.
diff --git a/src/ruby/lib/grpc/generic/client_stub.rb b/src/ruby/lib/grpc/generic/client_stub.rb
index b0e7226..62628cb 100644
--- a/src/ruby/lib/grpc/generic/client_stub.rb
+++ b/src/ruby/lib/grpc/generic/client_stub.rb
@@ -27,11 +27,10 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-require 'grpc'
 require 'grpc/generic/active_call'
 require 'xray/thread_dump_signal_handler'
 
-module GRPC
+module Google::RPC
 
   # ClientStub represents an endpoint used to send requests to GRPC servers.
   class ClientStub
diff --git a/src/ruby/lib/grpc/generic/rpc_desc.rb b/src/ruby/lib/grpc/generic/rpc_desc.rb
index b41543e..10767c4 100644
--- a/src/ruby/lib/grpc/generic/rpc_desc.rb
+++ b/src/ruby/lib/grpc/generic/rpc_desc.rb
@@ -27,9 +27,9 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-require 'grpc'
+require 'grpc/grpc'
 
-module GRPC
+module Google::RPC
 
   # RpcDesc is a Descriptor of an RPC method.
   class RpcDesc < Struct.new(:name, :input, :output, :marshal_method,
@@ -99,7 +99,7 @@
         # event.  Send a status of deadline exceeded
         logger.warn("late call: #{active_call}")
         send_status(active_call, DEADLINE_EXCEEDED, 'late')
-      rescue Core::EventError => e
+      rescue EventError => e
         # This is raised by GRPC internals but should rarely, if ever happen.
         # Log it, but don't notify the other endpoint..
         logger.warn("failed call: #{active_call}\n#{e}")
diff --git a/src/ruby/lib/grpc/generic/rpc_server.rb b/src/ruby/lib/grpc/generic/rpc_server.rb
index 76e7838..7754b8d 100644
--- a/src/ruby/lib/grpc/generic/rpc_server.rb
+++ b/src/ruby/lib/grpc/generic/rpc_server.rb
@@ -27,13 +27,13 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-require 'grpc'
+require 'grpc/grpc'
 require 'grpc/generic/active_call'
 require 'grpc/generic/service'
 require 'thread'
 require 'xray/thread_dump_signal_handler'
 
-module GRPC
+module Google::RPC
 
   # RpcServer hosts a number of services and makes them available on the
   # network.
diff --git a/src/ruby/lib/grpc/generic/service.rb b/src/ruby/lib/grpc/generic/service.rb
index 05bb0af..6a4356f 100644
--- a/src/ruby/lib/grpc/generic/service.rb
+++ b/src/ruby/lib/grpc/generic/service.rb
@@ -27,7 +27,6 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-require 'grpc'
 require 'grpc/generic/client_stub'
 require 'grpc/generic/rpc_desc'
 
@@ -51,7 +50,7 @@
 
 end
 
-module GRPC
+module Google::RPC
 
   # Provides behaviour used to implement schema-derived service classes.
   #