Initialize some vars to allow strict mode to work

IsRunning():
To check if $users is empty in strict mode we need the var to be initializez

ReportException:
Some test call this function without the second parameter, this is not allowed in strict mode if we don't initialize the variable

include/functions

@@ -1400,7 +1400,8 @@
         # AIX does not fully support pgrep options, so using ps instead
         if [ -n "${PGREPBINARY}" -a ! "${OS}" = "AIX" ]; then
             # When --user is used, perform a search using the -u option
-            if [ -n "${users}" ]; then
+                            # Initialize users for strict mode
+            if [ -n "${users:-}" ]; then
                 for u in "${users}"; do
                     user_uid=$(getent passwd ${u} 2> /dev/null | ${AWKBINARY} -F: '{print $3}')
                     # Only perform search if user exists and we had no match yet
@@ -2641,8 +2642,9 @@
 
     # Log exceptions
     ReportException() {
-        Report "exception_event[]=$1|$2|"
-        LogText "Exception: test has an exceptional event ($1) with text $2"
+        # Allow this function with only 1 parameter in strict mode with ${2-Text}
+        Report "exception_event[]=$1|${2-NoInfo}|"
+        LogText "Exception: test has an exceptional event ($1) with text ${2-NoText}"
     }