[doc] Add MX 1.7.0 EI DLC to available_images.md (#878)

Author: saimidu

available_images.md

@@ -113,7 +113,7 @@ Elastic Inference Containers
 |---------------------------------------------|--------------|--------------------|------------|---------------------------|---------------------------------------------------------------------------------------------------|
 |TensorFlow 1.15.0 with Elastic Inference     |inference 	 |No                  |CPU         |2.7 (py27), 3.6 (py36) 	   |763104351884.dkr.ecr.us-east-1.amazonaws.com/tensorflow-inference-eia:1.15.0-cpu-py36-ubuntu18.04  |
 |TensorFlow 2.0.0 with Elastic Inference 	  |inference     |No 			      |CPU 		   |2.7 (py27), 3.6 (py36) 	   |763104351884.dkr.ecr.us-east-1.amazonaws.com/tensorflow-inference-eia:2.0.0-cpu-py36-ubuntu18.04   |
-|MXNet 1.5.1 with Elastic Inference           |inference     |No 			      |CPU 		   |2.7 (py27), 3.6 (py36) 	   |763104351884.dkr.ecr.us-east-1.amazonaws.com/mxnet-inference-eia:1.5.1-cpu-py36-ubuntu16.04        |
+|MXNet 1.7.0 with Elastic Inference           |inference     |No 			      |CPU 		   |3.6 (py36) 	   |763104351884.dkr.ecr.us-east-1.amazonaws.com/mxnet-inference-eia:1.7.0-cpu-py36-ubuntu16.04        |
 |PyTorch 1.5.1 with Elastic Inference 		  |inference 	 |No 			      |CPU 		   |3.6 (py36) 			       |763104351884.dkr.ecr.us-east-1.amazonaws.com/pytorch-inference-eia:1.5.1-cpu-py36-ubuntu16.04      |
 
 
@@ -191,5 +191,6 @@ Prior Elastic Inference Container Versions
 ==============
 | Framework 			                      |Job Type 	 |Horovod Options 	  |CPU/GPU 	   |Python Version Options     |Example URL 			                                                                           |
 |---------------------------------------------|--------------|--------------------|------------|---------------------------|---------------------------------------------------------------------------------------------------|
+|MXNet 1.5.1 with Elastic Inference           |inference     |No 			      |CPU 		   |3.6 (py36) 	   |763104351884.dkr.ecr.us-east-1.amazonaws.com/mxnet-inference-eia:1.5.1-cpu-py36-ubuntu16.04        |
 |PyTorch 1.3.1 with Elastic Inference 		  |inference 	 |No 			      |CPU 		   |3.6 (py36) 			       |763104351884.dkr.ecr.us-east-1.amazonaws.com/pytorch-inference-eia:1.3.1-cpu-py36-ubuntu16.04      |
 |TensorFlow 1.14.0 with Elastic Inference 	  |inference 	 |No                      |CPU 	        |2.7 (py27), 3.6 (py36) 			      |763104351884.dkr.ecr.us-east-1.amazonaws.com/tensorflow-inference-eia:1.14.0-cpu-py36-ubuntu16.04   |