War on typos Act 1 (#655)

* Fix typos in lib/ directory

* Update generated bin/ files

* PR 655 -  War on typos Act 1 #655

- Updated modules in tools that were not updated
- Fixed tests to reflect proposed changes

---------

Co-authored-by: Sveta Smirnova <sveta.smirnova@percona.com>

lib/VersionCheck.pm

@@ -385,7 +385,7 @@ sub pingback {
    my (%args) = @_;
    my @required_args = qw(url instances);
    foreach my $arg ( @required_args ) {
-      die "I need a $arg arugment" unless $args{$arg};
+      die "I need a $arg argument" unless $args{$arg};
    }
    my $url       = $args{url};
    my $instances = $args{instances};
@@ -478,7 +478,7 @@ sub encode_client_response {
    my (%args) = @_;
    my @required_args = qw(items versions general_id);
    foreach my $arg ( @required_args ) {
-      die "I need a $arg arugment" unless $args{$arg};
+      die "I need a $arg argument" unless $args{$arg};
    }
    my ($items, $versions, $general_id) = @args{@required_args};
 
@@ -509,7 +509,7 @@ sub parse_server_response {
    my (%args) = @_;
    my @required_args = qw(response);
    foreach my $arg ( @required_args ) {
-      die "I need a $arg arugment" unless $args{$arg};
+      die "I need a $arg argument" unless $args{$arg};
    }
    my ($response) = @args{@required_args};
 
@@ -553,7 +553,7 @@ sub get_versions {
    my (%args) = @_;
    my @required_args = qw(items);
    foreach my $arg ( @required_args ) {
-      die "I need a $arg arugment" unless $args{$arg};
+      die "I need a $arg argument" unless $args{$arg};
    }
    my ($items) = @args{@required_args};
 
@@ -678,7 +678,7 @@ sub get_perl_module_version {
    return unless $item;
 
    # If there's a var, then its an explicit Perl variable name to get,
-   # else the item name is an implicity Perl module name to which we
+   # else the item name is an implicitly Perl module name to which we
    # append ::VERSION to get the module's version.
    my $var     = '$' . $item->{item} . '::VERSION';
    my $version = eval "use $item->{item}; $var;";