h2oaiGH-6707: added extended message to h2o.init to help user get aro…

…und version mismatch error [nocheck] (h2oai#15596)

* h2oaiGH-6707 : added extended message to h2o.init to help user get around version mismatch error.
h2oaiGH-6707 : remove R unit test because test environment cannot generate the correct error.  It will error out at packageVersion(h2o).  Pointed out by Tomas Fryda, we source and run the code and do not install the h2o packate.

* replace circumvent with avoid from Tomas.

h2o-py/h2o/backend/cluster.py

@@ -218,16 +218,19 @@ def check_version(self, strict=False):
             if build_number_h2o is None or build_number_h2o == "unknown":
                 message = ("Version mismatch. H2O is version {0}, but the h2o-python package is version {1}. "
                            "Upgrade H2O and h2o-Python to latest stable version - "
-                           "http://h2o-release.s3.amazonaws.com/h2o/latest_stable.html"
+                           "http://h2o-release.s3.amazonaws.com/h2o/latest_stable.html.  To avoid this error "
+                           "message (not recommended), you can set strict_version_check=False."
                            ).format(ver_h2o, ver_pkg)
             elif build_number_h2o == "99999":
                 message = ("Version mismatch. H2O is version {0}, but the h2o-python package is version {1}. "
-                           "This is a developer build, please contact your developer."
+                           "This is a developer build, please contact your developer.  To avoid this error "
+                           "message (not recommended), you can set strict_version_check=False."
                            ).format(ver_h2o, ver_pkg)
             else:
                 message = ("Version mismatch. H2O is version {0}, but the h2o-python package is version {1}. "
                            "Install the matching h2o-Python version from - "
-                           "http://h2o-release.s3.amazonaws.com/h2o/{2}/{3}/index.html."
+                           "http://h2o-release.s3.amazonaws.com/h2o/{2}/{3}/index.html.  To avoid this error "
+                           "message (not recommended), you can set strict_version_check=False."
                            ).format(ver_h2o, ver_pkg, branch_name_h2o, build_number_h2o)
             if strict:
                 raise H2OConnectionError(message)

h2o-r/h2o-package/R/connection.R

@@ -261,18 +261,22 @@ h2o.init <- function(ip = "localhost", port = 54321, name = NA_character_, start
 
       if( is.null( build_number_H2O ) ){
         stop(sprintf("Version mismatch! H2O is running version %s but h2o-R package is version %s.
-        Upgrade H2O and R to latest stable version - https://h2o-release.s3.amazonaws.com/h2o/latest_stable.html",
+        Upgrade H2O and R to latest stable version - https://h2o-release.s3.amazonaws.com/h2o/latest_stable.html.  
+        To avoid this error message (not recommended), you can set strict_version_check=FALSE.",
         verH2O, toString(verPkg)))
       } else if (build_number_H2O =="unknown"){
         stop(sprintf("Version mismatch! H2O is running version %s but h2o-R package is version %s.
-        Upgrade H2O and R to latest stable version - https://h2o-release.s3.amazonaws.com/h2o/latest_stable.html",
+        Upgrade H2O and R to latest stable version - https://h2o-release.s3.amazonaws.com/h2o/latest_stable.html. 
+         To avoid this error message (not recommended), you can set strict_version_check=FALSE.",
         verH2O, toString(verPkg)))
       } else if (build_number_H2O =="99999"){
         stop((sprintf("Version mismatch! H2O is running version %s but h2o-R package is version %s.
-        This is a developer build, please contact your developer",verH2O, toString(verPkg) )))
+        This is a developer build, please contact your developer.  To avoid this error message (not recommended),
+         you can set strict_version_check=FALSE.",verH2O, toString(verPkg) )))
       } else {
          stop(sprintf("Version mismatch! H2O is running version %s but h2o-R package is version %s.
-         Install the matching h2o-R version from - https://h2o-release.s3.amazonaws.com/h2o/%s/%s/index.html",
+         Install the matching h2o-R version from - https://h2o-release.s3.amazonaws.com/h2o/%s/%s/index.html.  To 
+         avoid this error message (not recommended), you can set strict_version_check=FALSE.",
          verH2O, toString(verPkg),branch_name_H2O,build_number_H2O))
       }
     }