grep -q breaks with Solaris grep, redirect stdout to /dev/null instead

Rev: src/sftp/testsuite/get-1-test:1.4
Rev: src/sftp/testsuite/ls-1-test:1.4
Rev: src/sftp/testsuite/ls-2-test:1.4
Rev: src/sftp/testsuite/put-1-test:1.4

src/sftp/testsuite/get-1-test

@@ -6,6 +6,6 @@ fi
 
 . $srcdir/common.sh
 
-client get "x1" | grep -q foo
+client get "x1" | grep foo > /dev/null
 
 

src/sftp/testsuite/ls-1-test

@@ -7,5 +7,5 @@ fi
 . $srcdir/common.sh
 
 # Match the d directory
-client ls "" | grep -q '^d.* d$'
+client ls "" | grep '^d.* d$' > /dev/null
 

src/sftp/testsuite/ls-2-test

@@ -7,5 +7,5 @@ fi
 . $srcdir/common.sh
 
 # Match the d directory
-client ls "d" | grep -q ' x3$'
+client ls "d" | grep ' x3$' > /dev/null
 

src/sftp/testsuite/put-1-test

@@ -8,7 +8,7 @@ fi
 
 rm -f "$TESTHOME/d/new"
 echo data | client put "d/new" && \
-    [ -r "$TESTHOME/d/new" ] && grep -q data "$TESTHOME/d/new"
+    [ -r "$TESTHOME/d/new" ] && grep data "$TESTHOME/d/new" > /dev/null