[device/arista] Add psuutil plugin for Arista platforms (#1221)

* Bump sonic-platform-modules-arista submodule

* Add psuutil plugnis for Arista platforms

Author: Staphylo

device/arista/x86_64-arista_7050_qx32/plugins/psuutil.py

@@ -0,0 +1,12 @@
+# psuutil.py
+#
+# Platform-specific PSU interface for SONiC
+#
+
+try:
+    import arista.utils.sonic_psu as arista_psuutil
+except ImportError as e:
+    raise ImportError("%s - required module not found" % str(e))
+
+
+PsuUtil = arista_psuutil.getPsuUtil()

device/arista/x86_64-arista_7050_qx32s/plugins/psuutil.py

@@ -0,0 +1,12 @@
+# psuutil.py
+#
+# Platform-specific PSU interface for SONiC
+#
+
+try:
+    import arista.utils.sonic_psu as arista_psuutil
+except ImportError as e:
+    raise ImportError("%s - required module not found" % str(e))
+
+
+PsuUtil = arista_psuutil.getPsuUtil()

device/arista/x86_64-arista_7060_cx32s/plugins/psuutil.py

@@ -0,0 +1,12 @@
+# psuutil.py
+#
+# Platform-specific PSU interface for SONiC
+#
+
+try:
+    import arista.utils.sonic_psu as arista_psuutil
+except ImportError as e:
+    raise ImportError("%s - required module not found" % str(e))
+
+
+PsuUtil = arista_psuutil.getPsuUtil()

device/arista/x86_64-arista_7260cx3_64/plugins/psuutil.py

@@ -0,0 +1,12 @@
+# psuutil.py
+#
+# Platform-specific PSU interface for SONiC
+#
+
+try:
+    import arista.utils.sonic_psu as arista_psuutil
+except ImportError as e:
+    raise ImportError("%s - required module not found" % str(e))
+
+
+PsuUtil = arista_psuutil.getPsuUtil()