Modified install-openmano.sh to use pyvcloud version 18.2.2

Change-Id: I252a4635d7e7297115bf85f291d3e49482997949
Signed-off-by: kasar <pkasar@vmware.com>
diff --git a/scripts/install-openmano.sh b/scripts/install-openmano.sh
index 98db368..6be885e 100755
--- a/scripts/install-openmano.sh
+++ b/scripts/install-openmano.sh
@@ -249,7 +249,7 @@
 
     # required for vmware connector TODO move that to separete opt in install script
     pip install --upgrade pip || exit 1
-    pip install pyvcloud || exit 1
+    pip install pyvcloud==18.2.2 || exit 1
     pip install progressbar || exit 1
     pip install prettytable || exit 1
     pip install pyvmomi || exit 1